The CMMG .22 LR replacement barrel kit (CMMG part number 22D7C4A) is built for shooters putting together a dedicated .22 LR AR-15 upper. It ships as a complete kit chambered in .22 LR with a 16.1-inch threaded barrel, and it includes a barrel collar that replaces the chamber adapter used on a CMMG 22 AR conversion. Made from black nitride-treated chromoly steel, the barrel is sized to fit AR-15 and Mk4 platforms for low-cost rimfire training or plinking. It is a straightforward way to build out a purpose-built rimfire upper instead of running a bolt-only conversion.

Key Specifications

• Chambered in .22 LR.
• Barrel measures 16.1 inches in length.
• Rifled with a 1:16 twist rate.
• Features a threaded muzzle.
• Finished in black nitride for corrosion resistance.
• Built from chromoly steel.
• Includes a barrel collar that replaces the chamber adapter on a 22 AR conversion.
• Fits AR-15 and Mk4 platforms.

Frequently Asked Questions

What does the kit include? The threaded .22 LR barrel and a collar that replaces the chamber adapter on a 22 AR conversion.

What platforms does it fit? AR-15 and Mk4 pattern uppers.

What is the twist rate? 1:16, suited to standard .22 LR bullet weights.

Buy the CMMG .22 LR Replacement Barrel Kit

Build a dedicated rimfire upper for cheap, low-recoil practice. Order this CMMG barrel kit from our AR barrels lineup, shipped fast from our Lubbock, Texas gun shop.