The CMMG replacement barrel kit (brand part no. 22D7C6C) gives AR-15 and Mk4 owners everything needed to convert an existing upper to a dedicated .22 LR setup, aside from a magazine. The kit pairs a 16.1-inch threaded, black nitride-finished chromoly steel barrel with a matched bolt carrier group so the conversion runs reliably straight out of the box. CMMG recommends a round-style hammer for best function, since notched hammers can cause issues with a .22 LR conversion, and 36-grain plated round-nose bullets have proven to be the most dependable choice for cycling. This kit is a cost-effective way to add a low-cost-to-shoot .22 LR training option to an existing centerfire AR upper.

Key Specifications

• Chambered in .22 LR for low-cost training and plinking.
• Barrel measures 16.1 inches in length.
• Uses a 1:16 twist rate.
• Finished in black nitride over chromoly steel for durability.
• Muzzle is threaded for muzzle devices.
• Includes a matched bolt carrier group for reliable .22 LR cycling.
• Built to fit AR-15/Mk4 uppers.
• Weighs approximately 2.54 pounds as a complete kit.
• CMMG recommends a round-style hammer for reliable function, since notched hammers can cause issues.

Frequently Asked Questions

Does this kit include a bolt carrier group? Yes, a matched BCG is included for reliable .22 LR function.

What hammer type works best with this conversion? CMMG recommends a round-style hammer, since notched hammers can cause function issues.

Is the barrel threaded? Yes, it is threaded for muzzle devices.

Buy the CMMG .22 LR Replacement Barrel Kit

Order this CMMG barrel kit from our Lubbock, Texas gun shop for fast, direct shipping, and browse more AR barrels to complete your conversion.