diff --git a/package.json b/package.json
index 51fd674f0..2e04b9a7b 100644
--- a/package.json
+++ b/package.json
@@ -19,9 +19,9 @@
     "test:unit:jest": "npm run test:unit:jest:unit && npm run test:unit:jest:localization",
     "test:unit:jest:unit": "jest ./test/unit/ --reporters=default",
     "test:unit:jest:localization": "jest ./test/localization/*.test.js --reporters=default",
-    "test:unit:tap": "tap ./test/{unit-legacy,localization-legacy}/*.js --no-coverage -R classic",
+    "test:unit:tap": "tap ./test/{unit-legacy,localization-legacy}/ --no-coverage -R classic",
     "test:unit:convertReportToXunit": "tap ./test/results/unit-raw.tap --no-coverage -R xunit > ./test/results/unit-tap-results.xml",
-    "test:coverage": "tap ./test/{unit-legacy,localization-legacy}/*.js --coverage --coverage-report=lcov",
+    "test:coverage": "tap ./test/{unit-legacy,localization-legacy}/ --coverage --coverage-report=lcov",
     "build": "npm run clean && npm run translate && NODE_OPTIONS=--max_old_space_size=8000 webpack --bail",
     "clean": "rm -rf ./build && rm -rf ./intl && mkdir -p build && mkdir -p intl",
     "deploy": "npm run deploy:s3 && npm run deploy:fastly",
diff --git a/src/redux/comments.js b/src/redux/comments.js
new file mode 100644
index 000000000..1ce577c55
--- /dev/null
+++ b/src/redux/comments.js
@@ -0,0 +1,188 @@
+const keyMirror = require('keymirror');
+const mergeWith = require('lodash.mergewith');
+const uniqBy = require('lodash.uniqby');
+
+const COMMENT_LIMIT = 20;
+
+module.exports.Status = keyMirror({
+    FETCHED: null,
+    NOT_FETCHED: null,
+    FETCHING: null,
+    ERROR: null
+});
+
+module.exports.getInitialState = () => ({
+    status: {
+        comments: module.exports.Status.NOT_FETCHED
+    },
+    comments: [],
+    replies: {},
+    moreCommentsToLoad: false
+});
+
+module.exports.commentsReducer = (state, action) => {
+    if (typeof state === 'undefined') {
+        state = module.exports.getInitialState();
+    }
+
+    switch (action.type) {
+    case 'RESET_TO_INTIAL_STATE':
+        return module.exports.getInitialState();
+    case 'RESET_COMMENTS':
+        return Object.assign({}, state, {
+            comments: [],
+            replies: {}
+        });
+    case 'SET_COMMENT_FETCH_STATUS':
+        return Object.assign({}, state, {
+            status: Object.assign({}, state.status, {
+                [action.infoType]: action.status
+            })
+        });
+    case 'SET_COMMENTS':
+        return Object.assign({}, state, {
+            comments: uniqBy(state.comments.concat(action.items), 'id')
+        });
+    case 'UPDATE_COMMENT':
+        if (action.topLevelCommentId) {
+            return Object.assign({}, state, {
+                replies: Object.assign({}, state.replies, {
+                    [action.topLevelCommentId]: state.replies[action.topLevelCommentId].map(comment => {
+                        if (comment.id === action.commentId) {
+                            return Object.assign({}, comment, action.comment);
+                        }
+                        return comment;
+                    })
+                })
+            });
+        }
+
+        return Object.assign({}, state, {
+            comments: state.comments.map(comment => {
+                if (comment.id === action.commentId) {
+                    return Object.assign({}, comment, action.comment);
+                }
+                return comment;
+            })
+        });
+    case 'ADD_NEW_COMMENT':
+        if (action.topLevelCommentId) {
+            return Object.assign({}, state, {
+                replies: Object.assign({}, state.replies, {
+                    // Replies to comments go at the end  of the thread
+                    [action.topLevelCommentId]: state.replies[action.topLevelCommentId].concat(action.comment)
+                })
+            });
+        }
+
+        // Reply to the top level project, put the reply at the beginning
+        return Object.assign({}, state, {
+            comments: [action.comment, ...state.comments],
+            replies: Object.assign({}, state.replies, {[action.comment.id]: []})
+        });
+    case 'UPDATE_ALL_REPLIES':
+        return Object.assign({}, state, {
+            replies: Object.assign({}, state.replies, {
+                [action.commentId]: state.replies[action.commentId].map(reply =>
+                    Object.assign({}, reply, action.comment)
+                )
+            })
+        });
+    case 'SET_REPLIES':
+        return Object.assign({}, state, {
+            // Append new replies to the state.replies structure
+            replies: mergeWith({}, state.replies, action.replies, (replies, newReplies) => (
+                uniqBy((replies || []).concat(newReplies || []), 'id')
+            )),
+            // Also set the `moreRepliesToLoad` property on the top-level comments
+            comments: state.comments.map(comment => {
+                if (action.replies[comment.id]) {
+                    return Object.assign({}, comment, {
+                        moreRepliesToLoad: action.replies[comment.id].length === COMMENT_LIMIT
+                    });
+                }
+                return comment;
+            })
+        });
+    case 'SET_MORE_COMMENTS_TO_LOAD':
+        return Object.assign({}, state, {
+            moreCommentsToLoad: action.moreCommentsToLoad
+        });
+    default:
+        return state;
+    }
+};
+
+module.exports.setFetchStatus = (type, status) => ({
+    type: 'SET_COMMENT_FETCH_STATUS',
+    infoType: type,
+    status: status
+});
+
+module.exports.setComments = items => ({
+    type: 'SET_COMMENTS',
+    items: items
+});
+
+module.exports.setReplies = replies => ({
+    type: 'SET_REPLIES',
+    replies: replies
+});
+
+module.exports.setCommentDeleted = (commentId, topLevelCommentId) => ({
+    type: 'UPDATE_COMMENT',
+    commentId: commentId,
+    topLevelCommentId: topLevelCommentId,
+    comment: {
+        visibility: 'deleted'
+    }
+});
+
+module.exports.setRepliesDeleted = commentId => ({
+    type: 'UPDATE_ALL_REPLIES',
+    commentId: commentId,
+    comment: {
+        visibility: 'deleted'
+    }
+});
+
+module.exports.setCommentReported = (commentId, topLevelCommentId) => ({
+    type: 'UPDATE_COMMENT',
+    commentId: commentId,
+    topLevelCommentId: topLevelCommentId,
+    comment: {
+        visibility: 'reported'
+    }
+});
+
+module.exports.setCommentRestored = (commentId, topLevelCommentId) => ({
+    type: 'UPDATE_COMMENT',
+    commentId: commentId,
+    topLevelCommentId: topLevelCommentId,
+    comment: {
+        visibility: 'visible'
+    }
+});
+
+module.exports.setRepliesRestored = commentId => ({
+    type: 'UPDATE_ALL_REPLIES',
+    commentId: commentId,
+    comment: {
+        visibility: 'visible'
+    }
+});
+
+module.exports.addNewComment = (comment, topLevelCommentId) => ({
+    type: 'ADD_NEW_COMMENT',
+    comment: comment,
+    topLevelCommentId: topLevelCommentId
+});
+
+module.exports.setMoreCommentsToLoad = moreCommentsToLoad => ({
+    type: 'SET_MORE_COMMENTS_TO_LOAD',
+    moreCommentsToLoad: moreCommentsToLoad
+});
+
+module.exports.resetComments = () => ({
+    type: 'RESET_COMMENTS'
+});
diff --git a/src/redux/preview.js b/src/redux/preview.js
index 7239eba47..dc11478ed 100644
--- a/src/redux/preview.js
+++ b/src/redux/preview.js
@@ -1,14 +1,9 @@
 const defaults = require('lodash.defaults');
 const keyMirror = require('keymirror');
-const eachLimit = require('async/eachLimit');
-const mergeWith = require('lodash.mergewith');
-const uniqBy = require('lodash.uniqby');
 
 const api = require('../lib/api');
 const log = require('../lib/log');
 
-const COMMENT_LIMIT = 20;
-
 module.exports.Status = keyMirror({
     FETCHED: null,
     NOT_FETCHED: null,
@@ -19,7 +14,6 @@ module.exports.Status = keyMirror({
 module.exports.getInitialState = () => ({
     status: {
         project: module.exports.Status.NOT_FETCHED,
-        comments: module.exports.Status.NOT_FETCHED,
         faved: module.exports.Status.NOT_FETCHED,
         loved: module.exports.Status.NOT_FETCHED,
         original: module.exports.Status.NOT_FETCHED,
@@ -33,8 +27,6 @@ module.exports.getInitialState = () => ({
     },
     projectInfo: {},
     remixes: [],
-    comments: [],
-    replies: {},
     faved: false,
     loved: false,
     original: {},
@@ -42,7 +34,6 @@ module.exports.getInitialState = () => ({
     projectStudios: [],
     curatedStudios: [],
     currentStudioIds: [],
-    moreCommentsToLoad: false,
     projectNotAvailable: false,
     visibilityInfo: {}
 });
@@ -96,76 +87,6 @@ module.exports.previewReducer = (state, action) => {
                 item !== action.studioId
             ))
         });
-    case 'RESET_COMMENTS':
-        return Object.assign({}, state, {
-            comments: [],
-            replies: {}
-        });
-    case 'SET_COMMENTS':
-        return Object.assign({}, state, {
-            comments: uniqBy(state.comments.concat(action.items), 'id')
-        });
-    case 'UPDATE_COMMENT':
-        if (action.topLevelCommentId) {
-            return Object.assign({}, state, {
-                replies: Object.assign({}, state.replies, {
-                    [action.topLevelCommentId]: state.replies[action.topLevelCommentId].map(comment => {
-                        if (comment.id === action.commentId) {
-                            return Object.assign({}, comment, action.comment);
-                        }
-                        return comment;
-                    })
-                })
-            });
-        }
-
-        return Object.assign({}, state, {
-            comments: state.comments.map(comment => {
-                if (comment.id === action.commentId) {
-                    return Object.assign({}, comment, action.comment);
-                }
-                return comment;
-            })
-        });
-    case 'ADD_NEW_COMMENT':
-        if (action.topLevelCommentId) {
-            return Object.assign({}, state, {
-                replies: Object.assign({}, state.replies, {
-                    // Replies to comments go at the end  of the thread
-                    [action.topLevelCommentId]: state.replies[action.topLevelCommentId].concat(action.comment)
-                })
-            });
-        }
-
-        // Reply to the top level project, put the reply at the beginning
-        return Object.assign({}, state, {
-            comments: [action.comment, ...state.comments],
-            replies: Object.assign({}, state.replies, {[action.comment.id]: []})
-        });
-    case 'UPDATE_ALL_REPLIES':
-        return Object.assign({}, state, {
-            replies: Object.assign({}, state.replies, {
-                [action.commentId]: state.replies[action.commentId].map(reply =>
-                    Object.assign({}, reply, action.comment)
-                )
-            })
-        });
-    case 'SET_REPLIES':
-        return Object.assign({}, state, {
-            // Append new replies to the state.replies structure
-            replies: mergeWith({}, state.replies, action.replies, (replies, newReplies) => (
-                uniqBy((replies || []).concat(newReplies || []), 'id')
-            )),
-            // Also set the `moreRepliesToLoad` property on the top-level comments
-            comments: state.comments.map(comment => {
-                if (action.replies[comment.id]) {
-                    return Object.assign({}, comment, {
-                        moreRepliesToLoad: action.replies[comment.id].length === COMMENT_LIMIT
-                    });
-                }
-                return comment;
-            })
-        });
     case 'SET_LOVED':
         return Object.assign({}, state, {
             loved: action.info
@@ -182,10 +103,6 @@ module.exports.previewReducer = (state, action) => {
         state = JSON.parse(JSON.stringify(state));
         state.status.studioRequests[action.studioId] = action.status;
         return state;
-    case 'SET_MORE_COMMENTS_TO_LOAD':
-        return Object.assign({}, state, {
-            moreCommentsToLoad: action.moreCommentsToLoad
-        });
     case 'SET_VISIBILITY_INFO':
         return Object.assign({}, state, {
             visibilityInfo: action.visibilityInfo
@@ -247,16 +164,6 @@ module.exports.setProjectStudios = items => ({
     items: items
 });
 
-module.exports.setComments = items => ({
-    type: 'SET_COMMENTS',
-    items: items
-});
-
-module.exports.setReplies = replies => ({
-    type: 'SET_REPLIES',
-    replies: replies
-});
-
 module.exports.setCuratedStudios = items => ({
     type: 'SET_CURATED_STUDIOS',
     items: items
@@ -284,64 +191,6 @@ module.exports.setStudioFetchStatus = (studioId, status) => ({
     status: status
 });
 
-module.exports.setCommentDeleted = (commentId, topLevelCommentId) => ({
-    type: 'UPDATE_COMMENT',
-    commentId: commentId,
-    topLevelCommentId: topLevelCommentId,
-    comment: {
-        visibility: 'deleted'
-    }
-});
-
-module.exports.setRepliesDeleted = commentId => ({
-    type: 'UPDATE_ALL_REPLIES',
-    commentId: commentId,
-    comment: {
-        visibility: 'deleted'
-    }
-});
-
-module.exports.setCommentReported = (commentId, topLevelCommentId) => ({
-    type: 'UPDATE_COMMENT',
-    commentId: commentId,
-    topLevelCommentId: topLevelCommentId,
-    comment: {
-        visibility: 'reported'
-    }
-});
-
-module.exports.setCommentRestored = (commentId, topLevelCommentId) => ({
-    type: 'UPDATE_COMMENT',
-    commentId: commentId,
-    topLevelCommentId: topLevelCommentId,
-    comment: {
-        visibility: 'visible'
-    }
-});
-
-module.exports.setRepliesRestored = commentId => ({
-    type: 'UPDATE_ALL_REPLIES',
-    commentId: commentId,
-    comment: {
-        visibility: 'visible'
-    }
-});
-
-module.exports.addNewComment = (comment, topLevelCommentId) => ({
-    type: 'ADD_NEW_COMMENT',
-    comment: comment,
-    topLevelCommentId: topLevelCommentId
-});
-
-module.exports.setMoreCommentsToLoad = moreCommentsToLoad => ({
-    type: 'SET_MORE_COMMENTS_TO_LOAD',
-    moreCommentsToLoad: moreCommentsToLoad
-});
-
-module.exports.resetComments = () => ({
-    type: 'RESET_COMMENTS'
-});
-
 module.exports.setVisibilityInfo = visibilityInfo => ({
     type: 'SET_VISIBILITY_INFO',
     visibilityInfo: visibilityInfo
@@ -462,94 +311,6 @@ module.exports.getFavedStatus = (id, username, token) => (dispatch => {
     });
 });
 
-module.exports.getTopLevelComments = (id, offset, ownerUsername, isAdmin, token) => (dispatch => {
-    dispatch(module.exports.setFetchStatus('comments', module.exports.Status.FETCHING));
-    api({
-        uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${id}/comments`,
-        authentication: token ? token : null,
-        params: {offset: offset || 0, limit: COMMENT_LIMIT}
-    }, (err, body, res) => {
-        if (err) {
-            dispatch(module.exports.setFetchStatus('comments', module.exports.Status.ERROR));
-            dispatch(module.exports.setError(err));
-            return;
-        }
-        if (typeof body === 'undefined' || res.statusCode >= 400) { // NotFound
-            dispatch(module.exports.setFetchStatus('comments', module.exports.Status.ERROR));
-            dispatch(module.exports.setError('No comment info'));
-            return;
-        }
-        dispatch(module.exports.setFetchStatus('comments', module.exports.Status.FETCHED));
-        dispatch(module.exports.setComments(body));
-        dispatch(module.exports.getReplies(id, body.map(comment => comment.id), 0, ownerUsername, isAdmin, token));
-
-        // If we loaded a full page of comments, assume there are more to load.
-        // This will be wrong (1 / COMMENT_LIMIT) of the time, but does not require
-        // any more server query complexity, so seems worth it. In the case of a project with
-        // number of comments divisible by the COMMENT_LIMIT, the load more button will be
-        // clickable, but upon clicking it will go away.
-        dispatch(module.exports.setMoreCommentsToLoad(body.length === COMMENT_LIMIT));
-    });
-});
-
-module.exports.getCommentById = (projectId, commentId, ownerUsername, isAdmin, token) => (dispatch => {
-    dispatch(module.exports.setFetchStatus('comments', module.exports.Status.FETCHING));
-    api({
-        uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${projectId}/comments/${commentId}`,
-        authentication: token ? token : null
-    }, (err, body, res) => {
-        if (err) {
-            dispatch(module.exports.setFetchStatus('comments', module.exports.Status.ERROR));
-            dispatch(module.exports.setError(err));
-            return;
-        }
-        if (!body || res.statusCode >= 400) { // NotFound
-            dispatch(module.exports.setFetchStatus('comments', module.exports.Status.ERROR));
-            dispatch(module.exports.setError('No comment info'));
-            return;
-        }
-
-        if (body.parent_id) {
-            // If the comment is a reply, load the parent
-            return dispatch(module.exports.getCommentById(projectId, body.parent_id, ownerUsername, isAdmin, token));
-        }
-
-        // If the comment is not a reply, show it as top level and load replies
-        dispatch(module.exports.setFetchStatus('comments', module.exports.Status.FETCHED));
-        dispatch(module.exports.setComments([body]));
-        dispatch(module.exports.getReplies(projectId, [body.id], 0, ownerUsername, isAdmin, token));
-    });
-});
-
-module.exports.getReplies = (projectId, commentIds, offset, ownerUsername, isAdmin, token) => (dispatch => {
-    dispatch(module.exports.setFetchStatus('replies', module.exports.Status.FETCHING));
-    const fetchedReplies = {};
-    eachLimit(commentIds, 10, (parentId, callback) => {
-        api({
-            uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${projectId}/comments/${parentId}/replies`,
-            authentication: token ? token : null,
-            params: {offset: offset || 0, limit: COMMENT_LIMIT}
-        }, (err, body, res) => {
-            if (err) {
-                return callback(`Error fetching comment replies: ${err}`);
-            }
-            if (typeof body === 'undefined' || res.statusCode >= 400) { // NotFound
-                return callback('No comment reply information');
-            }
-            fetchedReplies[parentId] = body;
-            callback(null, body);
-        });
-    }, err => {
-        if (err) {
-            dispatch(module.exports.setFetchStatus('replies', module.exports.Status.ERROR));
-            dispatch(module.exports.setError(err));
-            return;
-        }
-        dispatch(module.exports.setFetchStatus('replies', module.exports.Status.FETCHED));
-        dispatch(module.exports.setReplies(fetchedReplies));
-    });
-});
-
 module.exports.setFavedStatus = (faved, id, username, token) => (dispatch => {
     dispatch(module.exports.setFetchStatus('faved', module.exports.Status.FETCHING));
     if (faved) {
@@ -882,62 +643,6 @@ module.exports.updateProject = (id, jsonData, username, token) => (dispatch => {
     });
 });
 
-module.exports.deleteComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
-    /* TODO fetching/fetched/error states updates for comment deleting */
-    api({
-        uri: `/proxy/comments/project/${projectId}/comment/${commentId}`,
-        authentication: token,
-        withCredentials: true,
-        method: 'DELETE',
-        useCsrf: true
-    }, (err, body, res) => {
-        if (err || res.statusCode !== 200) {
-            log.error(err || res.body);
-            return;
-        }
-        dispatch(module.exports.setCommentDeleted(commentId, topLevelCommentId));
-        if (!topLevelCommentId) {
-            dispatch(module.exports.setRepliesDeleted(commentId));
-        }
-    });
-});
-
-module.exports.reportComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
-    api({
-        uri: `/proxy/project/${projectId}/comment/${commentId}/report`,
-        authentication: token,
-        withCredentials: true,
-        method: 'POST',
-        useCsrf: true
-    }, (err, body, res) => {
-        if (err || res.statusCode !== 200) {
-            log.error(err || res.body);
-            return;
-        }
-        // TODO use the reportId in the response for unreporting functionality
-        dispatch(module.exports.setCommentReported(commentId, topLevelCommentId));
-    });
-});
-
-module.exports.restoreComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
-    api({
-        uri: `/proxy/admin/project/${projectId}/comment/${commentId}/undelete`,
-        authentication: token,
-        withCredentials: true,
-        method: 'PUT',
-        useCsrf: true
-    }, (err, body, res) => {
-        if (err || res.statusCode !== 200) {
-            log.error(err || res.body);
-            return;
-        }
-        dispatch(module.exports.setCommentRestored(commentId, topLevelCommentId));
-        if (!topLevelCommentId) {
-            dispatch(module.exports.setRepliesRestored(commentId));
-        }
-    });
-});
-
 module.exports.shareProject = (projectId, token) => (dispatch => {
     dispatch(module.exports.setFetchStatus('project', module.exports.Status.FETCHING));
     api({
diff --git a/src/redux/project-comment-actions.js b/src/redux/project-comment-actions.js
new file mode 100644
index 000000000..6a4e6c354
--- /dev/null
+++ b/src/redux/project-comment-actions.js
@@ -0,0 +1,180 @@
+const eachLimit = require('async/eachLimit');
+
+const api = require('../lib/api');
+const log = require('../lib/log');
+
+const COMMENT_LIMIT = 20;
+
+const {
+    addNewComment,
+    resetComments,
+    Status,
+    setFetchStatus,
+    setCommentDeleted,
+    setCommentReported,
+    setCommentRestored,
+    setMoreCommentsToLoad,
+    setComments,
+    setError,
+    setReplies,
+    setRepliesDeleted,
+    setRepliesRestored
+} = require('../redux/comments.js');
+
+const getReplies = (projectId, commentIds, offset, ownerUsername, isAdmin, token) => (dispatch => {
+    dispatch(setFetchStatus('replies', Status.FETCHING));
+    const fetchedReplies = {};
+    eachLimit(commentIds, 10, (parentId, callback) => {
+        api({
+            uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${projectId}/comments/${parentId}/replies`,
+            authentication: token ? token : null,
+            params: {offset: offset || 0, limit: COMMENT_LIMIT}
+        }, (err, body, res) => {
+            if (err) {
+                return callback(`Error fetching comment replies: ${err}`);
+            }
+            if (typeof body === 'undefined' || res.statusCode >= 400) { // NotFound
+                return callback('No comment reply information');
+            }
+            fetchedReplies[parentId] = body;
+            callback(null, body);
+        });
+    }, err => {
+        if (err) {
+            dispatch(setFetchStatus('replies', Status.ERROR));
+            dispatch(setError(err));
+            return;
+        }
+        dispatch(setFetchStatus('replies', Status.FETCHED));
+        dispatch(setReplies(fetchedReplies));
+    });
+});
+
+const getTopLevelComments = (id, offset, ownerUsername, isAdmin, token) => (dispatch => {
+    dispatch(setFetchStatus('comments', Status.FETCHING));
+    api({
+        uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${id}/comments`,
+        authentication: token ? token : null,
+        params: {offset: offset || 0, limit: COMMENT_LIMIT}
+    }, (err, body, res) => {
+        if (err) {
+            dispatch(setFetchStatus('comments', Status.ERROR));
+            dispatch(setError(err));
+            return;
+        }
+        if (typeof body === 'undefined' || res.statusCode >= 400) { // NotFound
+            dispatch(setFetchStatus('comments', Status.ERROR));
+            dispatch(setError('No comment info'));
+            return;
+        }
+        dispatch(setFetchStatus('comments', Status.FETCHED));
+        dispatch(setComments(body));
+        dispatch(getReplies(id, body.map(comment => comment.id), 0, ownerUsername, isAdmin, token));
+
+        // If we loaded a full page of comments, assume there are more to load.
+        // This will be wrong (1 / COMMENT_LIMIT) of the time, but does not require
+        // any more server query complexity, so seems worth it. In the case of a project with
+        // number of comments divisible by the COMMENT_LIMIT, the load more button will be
+        // clickable, but upon clicking it will go away.
+        dispatch(setMoreCommentsToLoad(body.length === COMMENT_LIMIT));
+    });
+});
+
+const getCommentById = (projectId, commentId, ownerUsername, isAdmin, token) => (dispatch => {
+    dispatch(setFetchStatus('comments', Status.FETCHING));
+    api({
+        uri: `${isAdmin ? '/admin' : `/users/${ownerUsername}`}/projects/${projectId}/comments/${commentId}`,
+        authentication: token ? token : null
+    }, (err, body, res) => {
+        if (err) {
+            dispatch(setFetchStatus('comments', Status.ERROR));
+            dispatch(setError(err));
+            return;
+        }
+        if (!body || res.statusCode >= 400) { // NotFound
+            dispatch(setFetchStatus('comments', Status.ERROR));
+            dispatch(setError('No comment info'));
+            return;
+        }
+
+        if (body.parent_id) {
+            // If the comment is a reply, load the parent
+            return dispatch(getCommentById(projectId, body.parent_id, ownerUsername, isAdmin, token));
+        }
+
+        // If the comment is not a reply, show it as top level and load replies
+        dispatch(setFetchStatus('comments', Status.FETCHED));
+        dispatch(setComments([body]));
+        dispatch(getReplies(projectId, [body.id], 0, ownerUsername, isAdmin, token));
+    });
+});
+
+const deleteComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
+    /* TODO fetching/fetched/error states updates for comment deleting */
+    api({
+        uri: `/proxy/comments/project/${projectId}/comment/${commentId}`,
+        authentication: token,
+        withCredentials: true,
+        method: 'DELETE',
+        useCsrf: true
+    }, (err, body, res) => {
+        if (err || res.statusCode !== 200) {
+            log.error(err || res.body);
+            return;
+        }
+        dispatch(setCommentDeleted(commentId, topLevelCommentId));
+        if (!topLevelCommentId) {
+            dispatch(setRepliesDeleted(commentId));
+        }
+    });
+});
+
+const reportComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
+    api({
+        uri: `/proxy/project/${projectId}/comment/${commentId}/report`,
+        authentication: token,
+        withCredentials: true,
+        method: 'POST',
+        useCsrf: true
+    }, (err, body, res) => {
+        if (err || res.statusCode !== 200) {
+            log.error(err || res.body);
+            return;
+        }
+        // TODO use the reportId in the response for unreporting functionality
+        dispatch(setCommentReported(commentId, topLevelCommentId));
+    });
+});
+
+const restoreComment = (projectId, commentId, topLevelCommentId, token) => (dispatch => {
+    api({
+        uri: `/proxy/admin/project/${projectId}/comment/${commentId}/undelete`,
+        authentication: token,
+        withCredentials: true,
+        method: 'PUT',
+        useCsrf: true
+    }, (err, body, res) => {
+        if (err || res.statusCode !== 200) {
+            log.error(err || res.body);
+            return;
+        }
+        dispatch(setCommentRestored(commentId, topLevelCommentId));
+        if (!topLevelCommentId) {
+            dispatch(setRepliesRestored(commentId));
+        }
+    });
+});
+
+module.exports = {
+    getTopLevelComments,
+    getCommentById,
+    getReplies,
+    deleteComment,
+    reportComment,
+    restoreComment,
+
+    // Re-export these specific action creators directly so the implementer
+    // does not need to go to two places for comment actions
+    addNewComment,
+    resetComments
+};
diff --git a/src/views/preview/preview.jsx b/src/views/preview/preview.jsx
index 3da330c3c..05d484503 100644
--- a/src/views/preview/preview.jsx
+++ b/src/views/preview/preview.jsx
@@ -5,6 +5,7 @@ const Page = require('../../components/page/www/page.jsx');
 const render = require('../../lib/render.jsx');
 
 const previewActions = require('../../redux/preview.js');
+const commentActions = require('../../redux/comments.js');
 
 const isSupportedBrowser = require('../../lib/supported-browser').default;
 const UnsupportedBrowser = require('./unsupported-browser.jsx');
@@ -16,6 +17,7 @@ if (isSupportedBrowser()) {
         document.getElementById('app'),
         {
             preview: previewActions.previewReducer,
+            comments: commentActions.commentsReducer,
             ...ProjectView.guiReducers
         },
         {
diff --git a/src/views/preview/project-view.jsx b/src/views/preview/project-view.jsx
index f540c2f8c..2dc34e4cb 100644
--- a/src/views/preview/project-view.jsx
+++ b/src/views/preview/project-view.jsx
@@ -29,6 +29,7 @@ const Meta = require('./meta.jsx');
 const sessionActions = require('../../redux/session.js');
 const navigationActions = require('../../redux/navigation.js');
 const previewActions = require('../../redux/preview.js');
+const projectCommentActions = require('../../redux/project-comment-actions.js');
 
 const frameless = require('../../lib/frameless');
 
@@ -998,7 +999,7 @@ const mapStateToProps = state => {
         canShare: userOwnsProject && state.permissions.social,
         canToggleComments: userOwnsProject || isAdmin,
         canUseBackpack: isLoggedIn,
-        comments: state.preview.comments,
+        comments: state.comments.comments,
         enableCommunity: projectInfoPresent,
         faved: state.preview.faved,
         favedLoaded: state.preview.status.faved === previewActions.Status.FETCHED,
@@ -1013,7 +1014,7 @@ const mapStateToProps = state => {
         isShared: isShared,
         loved: state.preview.loved,
         lovedLoaded: state.preview.status.loved === previewActions.Status.FETCHED,
-        moreCommentsToLoad: state.preview.moreCommentsToLoad,
+        moreCommentsToLoad: state.comments.moreCommentsToLoad,
         original: state.preview.original,
         parent: state.preview.parent,
         playerMode: state.scratchGui.mode.isPlayerOnly,
@@ -1022,7 +1023,7 @@ const mapStateToProps = state => {
         projectStudios: state.preview.projectStudios,
         registrationOpen: state.navigation.registrationOpen,
         remixes: state.preview.remixes,
-        replies: state.preview.replies,
+        replies: state.comments.replies,
         sessionStatus: state.session.status, // check if used
         useScratch3Registration: state.navigation.useScratch3Registration,
         user: state.session.session.user,
@@ -1034,16 +1035,16 @@ const mapStateToProps = state => {
 
 const mapDispatchToProps = dispatch => ({
     handleAddComment: (comment, topLevelCommentId) => {
-        dispatch(previewActions.addNewComment(comment, topLevelCommentId));
+        dispatch(projectCommentActions.addNewComment(comment, topLevelCommentId));
     },
     handleDeleteComment: (projectId, commentId, topLevelCommentId, token) => {
-        dispatch(previewActions.deleteComment(projectId, commentId, topLevelCommentId, token));
+        dispatch(projectCommentActions.deleteComment(projectId, commentId, topLevelCommentId, token));
     },
     handleReportComment: (projectId, commentId, topLevelCommentId, token) => {
-        dispatch(previewActions.reportComment(projectId, commentId, topLevelCommentId, token));
+        dispatch(projectCommentActions.reportComment(projectId, commentId, topLevelCommentId, token));
     },
     handleRestoreComment: (projectId, commentId, topLevelCommentId, token) => {
-        dispatch(previewActions.restoreComment(projectId, commentId, topLevelCommentId, token));
+        dispatch(projectCommentActions.restoreComment(projectId, commentId, topLevelCommentId, token));
     },
     handleOpenRegistration: event => {
         event.preventDefault();
@@ -1061,8 +1062,8 @@ const mapDispatchToProps = dispatch => ({
         dispatch(navigationActions.toggleLoginOpen());
     },
     handleSeeAllComments: (id, ownerUsername, isAdmin, token) => {
-        dispatch(previewActions.resetComments());
-        dispatch(previewActions.getTopLevelComments(id, 0, ownerUsername, isAdmin, token));
+        dispatch(projectCommentActions.resetComments());
+        dispatch(projectCommentActions.getTopLevelComments(id, 0, ownerUsername, isAdmin, token));
     },
     handleUpdateProjectThumbnail: (id, blob) => {
         dispatch(previewActions.updateProjectThumbnail(id, blob));
@@ -1093,13 +1094,13 @@ const mapDispatchToProps = dispatch => ({
         }
     },
     getTopLevelComments: (id, offset, ownerUsername, isAdmin, token) => {
-        dispatch(previewActions.getTopLevelComments(id, offset, ownerUsername, isAdmin, token));
+        dispatch(projectCommentActions.getTopLevelComments(id, offset, ownerUsername, isAdmin, token));
     },
     getCommentById: (projectId, commentId, ownerUsername, isAdmin, token) => {
-        dispatch(previewActions.getCommentById(projectId, commentId, ownerUsername, isAdmin, token));
+        dispatch(projectCommentActions.getCommentById(projectId, commentId, ownerUsername, isAdmin, token));
     },
     getMoreReplies: (projectId, commentId, offset, ownerUsername, isAdmin, token) => {
-        dispatch(previewActions.getReplies(projectId, [commentId], offset, ownerUsername, isAdmin, token));
+        dispatch(projectCommentActions.getReplies(projectId, [commentId], offset, ownerUsername, isAdmin, token));
     },
     getFavedStatus: (id, username, token) => {
         dispatch(previewActions.getFavedStatus(id, username, token));
@@ -1136,7 +1137,7 @@ const mapDispatchToProps = dispatch => ({
     },
     remixProject: () => {
         dispatch(GUI.remixProject());
-        dispatch(previewActions.resetComments());
+        dispatch(projectCommentActions.resetComments());
     },
     setPlayer: player => {
         dispatch(GUI.setPlayer(player));
diff --git a/test/unit-legacy/redux/comments-test.js b/test/unit-legacy/redux/comments-test.js
new file mode 100644
index 000000000..5c72233eb
--- /dev/null
+++ b/test/unit-legacy/redux/comments-test.js
@@ -0,0 +1,151 @@
+const tap = require('tap');
+const Comments = require('../../../src/redux/comments');
+const initialState = Comments.getInitialState();
+const reducer = Comments.commentsReducer;
+
+let state;
+
+tap.tearDown(() => process.nextTick(process.exit));
+
+tap.test('Reducer', t => {
+    t.type(reducer, 'function');
+    t.type(initialState, 'object');
+
+    // Reducers should return their default state when called without state
+    let undefinedState;
+    t.deepEqual(initialState, reducer(undefinedState, {type: 'fake action'}));
+    t.end();
+});
+
+tap.test('setFetchStatus', t => {
+    // initial value
+    t.equal(initialState.status.comments, Comments.Status.NOT_FETCHED);
+
+    state = reducer(initialState, Comments.setFetchStatus('comments', Comments.Status.FETCHING));
+    t.equal(state.status.comments, Comments.Status.FETCHING);
+
+    state = reducer(state, Comments.setFetchStatus('comments', Comments.Status.FETCHED));
+    t.equal(state.status.comments, Comments.Status.FETCHED);
+
+    t.end();
+});
+
+tap.test('setComments', t => {
+    // Initial value
+    t.deepEqual(initialState.comments, []);
+
+    state = reducer(initialState, Comments.setComments([{id: 1}, {id: 2}]));
+    state = reducer(state, Comments.setComments([{id: 3}, {id: 4}]));
+    t.deepEqual(state.comments, [{id: 1}, {id: 2}, {id: 3}, {id: 4}]);
+
+    t.end();
+});
+
+const commentState = {
+    comments: [
+        {id: 'id1', visibility: 'visible'},
+        {id: 'id2', visibility: 'visible'},
+        {id: 'id3', visibility: 'visible'}
+    ],
+    replies: {
+        id1: [
+            {id: 'id4', visibility: 'visible'},
+            {id: 'id5', visibility: 'visible'}
+        ]
+    }
+};
+
+tap.test('setComments, discards duplicates', t => {
+    state = reducer(commentState, Comments.setComments([{id: 'id1'}]));
+    // Does not increase the number of comments, still 3
+    t.equal(state.comments.length, 3);
+    t.end();
+});
+
+tap.test('setCommentDeleted, top level comment', t => {
+    state = reducer(commentState, Comments.setCommentDeleted('id2'));
+    t.equal(state.comments[1].visibility, 'deleted');
+    t.end();
+});
+
+tap.test('setCommentDeleted, reply comment', t => {
+    state = reducer(commentState, Comments.setCommentDeleted('id4', 'id1'));
+    t.equal(state.replies.id1[0].visibility, 'deleted');
+    t.end();
+});
+
+tap.test('setRepliesDeleted/Restored', t => {
+    state = reducer(commentState, Comments.setRepliesDeleted('id1'));
+    t.equal(state.replies.id1[0].visibility, 'deleted');
+    t.equal(state.replies.id1[1].visibility, 'deleted');
+
+    state = reducer(state, Comments.setRepliesRestored('id1'));
+    t.equal(state.replies.id1[0].visibility, 'visible');
+    t.equal(state.replies.id1[1].visibility, 'visible');
+    t.end();
+});
+
+tap.test('setCommentReported, top level comment', t => {
+    state = reducer(commentState, Comments.setCommentReported('id2'));
+    t.equal(state.comments[1].visibility, 'reported');
+    t.end();
+});
+
+tap.test('setCommentReported, reply comment', t => {
+    state = reducer(commentState, Comments.setCommentReported('id4', 'id1'));
+    t.equal(state.replies.id1[0].visibility, 'reported');
+    t.end();
+});
+
+tap.test('addNewComment, top level comment', t => {
+    state = reducer(commentState, Comments.addNewComment({id: 'new comment'}));
+    // Adds comment to beginning of list
+    t.equal(state.comments[0].id, 'new comment');
+    t.end();
+});
+
+tap.test('addNewComment, reply comment', t => {
+    state = reducer(commentState, Comments.addNewComment({id: 'new comment'}, 'id1'));
+    // Adds replies to the end of the replies list
+    t.equal(state.replies.id1[2].id, 'new comment');
+    t.end();
+});
+
+tap.test('setReplies', t => {
+    // setReplies should append new replies
+    state = reducer(commentState, Comments.setReplies({
+        id1: {id: 'id6'}
+    }));
+    t.equal(state.replies.id1[2].id, 'id6');
+    t.equal(state.comments[0].moreRepliesToLoad, false);
+
+    // setReplies should ignore duplicates, do the same as above again
+    t.equal(state.replies.id1.length, 3);
+    state = reducer(state, Comments.setReplies({id1: {id: 'id6'}}));
+    t.equal(state.replies.id1.length, 3);
+
+    // setReplies can add replies to a comment that didn't have any
+    state = reducer(state, Comments.setReplies({
+        id2: {id: 'id7'}
+    }));
+    t.equal(state.replies.id1.length, 3);
+    t.equal(state.replies.id2.length, 1);
+    t.equal(state.replies.id2[0].id, 'id7');
+    t.equal(state.comments[0].moreRepliesToLoad, false);
+    t.equal(state.comments[1].moreRepliesToLoad, false);
+
+    // Getting 20 (COMMENT_LIMIT) replies sets moreRepliesToLoad to true
+    state = reducer(state, Comments.setReplies({
+        id3: (new Array(20)).map((_, i) => ({id: `id${i + 1}`}))
+    }));
+    t.equal(state.comments[0].moreRepliesToLoad, false);
+    t.equal(state.comments[1].moreRepliesToLoad, false);
+    t.equal(state.comments[2].moreRepliesToLoad, true);
+
+    // Getting one more reply sets moreRepliesToLoad back to false
+    state = reducer(state, Comments.setReplies({
+        id3: {id: 'id21'}
+    }));
+    t.equal(state.comments[2].moreRepliesToLoad, false);
+    t.end();
+});
diff --git a/test/unit-legacy/redux/preview-test.js b/test/unit-legacy/redux/preview-test.js
index 24a91ce84..f1fa0488d 100644
--- a/test/unit-legacy/redux/preview-test.js
+++ b/test/unit-legacy/redux/preview-test.js
@@ -54,123 +54,3 @@ tap.test('updateProjectInfo', t => {
     });
     t.end();
 });
-
-tap.test('setComments', t => {
-    // Initial value
-    t.deepEqual(initialState.comments, []);
-
-    state = reducer(initialState, Preview.setComments([{id: 1}, {id: 2}]));
-    state = reducer(state, Preview.setComments([{id: 3}, {id: 4}]));
-    t.deepEqual(state.comments, [{id: 1}, {id: 2}, {id: 3}, {id: 4}]);
-
-    t.end();
-});
-
-const commentState = {
-    comments: [
-        {id: 'id1', visibility: 'visible'},
-        {id: 'id2', visibility: 'visible'},
-        {id: 'id3', visibility: 'visible'}
-    ],
-    replies: {
-        id1: [
-            {id: 'id4', visibility: 'visible'},
-            {id: 'id5', visibility: 'visible'}
-        ]
-    }
-};
-
-tap.test('setComments, discards duplicates', t => {
-    state = reducer(commentState, Preview.setComments([{id: 'id1'}]));
-    // Does not increase the number of comments, still 3
-    t.equal(state.comments.length, 3);
-    t.end();
-});
-
-tap.test('setCommentDeleted, top level comment', t => {
-    state = reducer(commentState, Preview.setCommentDeleted('id2'));
-    t.equal(state.comments[1].visibility, 'deleted');
-    t.end();
-});
-
-tap.test('setCommentDeleted, reply comment', t => {
-    state = reducer(commentState, Preview.setCommentDeleted('id4', 'id1'));
-    t.equal(state.replies.id1[0].visibility, 'deleted');
-    t.end();
-});
-
-tap.test('setRepliesDeleted/Restored', t => {
-    state = reducer(commentState, Preview.setRepliesDeleted('id1'));
-    t.equal(state.replies.id1[0].visibility, 'deleted');
-    t.equal(state.replies.id1[1].visibility, 'deleted');
-
-    state = reducer(state, Preview.setRepliesRestored('id1'));
-    t.equal(state.replies.id1[0].visibility, 'visible');
-    t.equal(state.replies.id1[1].visibility, 'visible');
-    t.end();
-});
-
-tap.test('setCommentReported, top level comment', t => {
-    state = reducer(commentState, Preview.setCommentReported('id2'));
-    t.equal(state.comments[1].visibility, 'reported');
-    t.end();
-});
-
-tap.test('setCommentReported, reply comment', t => {
-    state = reducer(commentState, Preview.setCommentReported('id4', 'id1'));
-    t.equal(state.replies.id1[0].visibility, 'reported');
-    t.end();
-});
-
-tap.test('addNewComment, top level comment', t => {
-    state = reducer(commentState, Preview.addNewComment({id: 'new comment'}));
-    // Adds comment to beginning of list
-    t.equal(state.comments[0].id, 'new comment');
-    t.end();
-});
-
-tap.test('addNewComment, reply comment', t => {
-    state = reducer(commentState, Preview.addNewComment({id: 'new comment'}, 'id1'));
-    // Adds replies to the end of the replies list
-    t.equal(state.replies.id1[2].id, 'new comment');
-    t.end();
-});
-
-tap.test('setReplies', t => {
-    // setReplies should append new replies
-    state = reducer(commentState, Preview.setReplies({
-        id1: {id: 'id6'}
-    }));
-    t.equal(state.replies.id1[2].id, 'id6');
-    t.equal(state.comments[0].moreRepliesToLoad, false);
-
-    // setReplies should ignore duplicates, do the same as above again
-    t.equal(state.replies.id1.length, 3);
-    state = reducer(state, Preview.setReplies({id1: {id: 'id6'}}));
-    t.equal(state.replies.id1.length, 3);
-
-    // setReplies can add replies to a comment that didn't have any
-    state = reducer(state, Preview.setReplies({
-        id2: {id: 'id7'}
-    }));
-    t.equal(state.replies.id1.length, 3);
-    t.equal(state.replies.id2.length, 1);
-    t.equal(state.replies.id2[0].id, 'id7');
-    t.equal(state.comments[0].moreRepliesToLoad, false);
-    t.equal(state.comments[1].moreRepliesToLoad, false);
-
-    // Getting 20 (COMMENT_LIMIT) replies sets moreRepliesToLoad to true
-    state = reducer(state, Preview.setReplies({
-        id3: (new Array(20)).map((_, i) => ({id: `id${i + 1}`}))
-    }));
-    t.equal(state.comments[0].moreRepliesToLoad, false);
-    t.equal(state.comments[1].moreRepliesToLoad, false);
-    t.equal(state.comments[2].moreRepliesToLoad, true);
-
-    // Getting one more reply sets moreRepliesToLoad back to false
-    state = reducer(state, Preview.setReplies({
-        id3: {id: 'id21'}
-    }));
-    t.equal(state.comments[2].moreRepliesToLoad, false);
-    t.end();
-});