User Ratings
No ratings yet
Be the first to review this product
The CMMG 55CA9D7 Receiver Extension MK4 Black Steel AR Platform is a receiver extension designed for MK4 platforms. Steel construction with a black finish.
- Material: Steel
- Finish: Black
- SKU: ACC-CMMG-55CA9D7
- MPN: 55CA9D7
- UPC: 816422020676
- Note: Not shippable to California, Illinois, or Washington.
Specifications
- Manufacturer:
- Cmmg
- Category:
- Buffer Tube
- UPC:
- 816422020676
- MPN:
- 55CA9D7
- Required Component:
- Yes
Sponsored
Wheeler Tools
Get your trigger pull exactly right
Wheeler's digital trigger gauge gives you a precise read on pull weight every time.
Shop ToolsWhere to Buy
Have one to sell?
Price History
Current
$35.05
Lowest
$34.36
Highest
$35.05
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertRelated Guides
Guide
AR-15 Components: A Complete Reference Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
The AR-15 Buffer System Explained
A neutral overview of AR-15 buffer systems, covering carbine vs. rifle receiver extensions, buffer weights, springs, and how these parts affect cycling and recoil.
5 min read