SKU: CA22D7C6C
UPC: 815835013985
MPN: 22D7C6C
The CMMG Barrel and Bolt Group Kit 16.1-inch M4 in .22LR is a dedicated rimfire upper receiver assembly designed to convert an existing AR platform rifle into a .22 Long Rifle trainer or practice build. This kit eliminates the need to source individual components separately, providing shooters with a factory-matched barrel and bolt group that function as a complete upper assembly unit. The 16.1-inch barrel length preserves the compact profile of an M4 while delivering effective velocity typical of .22LR rounds in the mid-1000 fps range, making it suitable for marksmanship refinement, low-recoil training, or recreational plinking without the ballistic demands of centerfire calibers.
The kit's modular design allows direct integration with existing AR lower receivers and furniture, preserving your platform investment while adding specialized .22LR capability. At 2.54 lbs, the barrel and bolt group assembly remains lightweight, contributing to a well-balanced rifle platform ideal for extended training sessions. CMMG's factory-matched bolt and barrel ensure reliable feeding and ejection with standard .22LR ammunition, reducing troubleshooting during break-in. The conversion approach eliminates the expense of purchasing a complete secondary rifle while maintaining the ergonomic and mechanical familiarity of your primary platform.
This configuration suits tactical training environments, military or law enforcement marksmanship programs seeking cost-effective live-fire volume, competitive shooters developing fundamentals, and civilian operators building dedicated .22LR AR uppers for soft-tissue hunting or pest control. The rimfire caliber's minimal noise signature and ammunition cost relative to centerfire rounds make it practical for high-round-count training days. Installation requires only standard AR upper assembly tools and basic gunsmithing familiarity. As noted, magazine purchase is a separate requirement—standard AR-pattern .22LR magazines are widely available and compatible with the platform.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
