CMMG .22 LR Conversion BCG (AR15 5.56/.223 Drop-In Style)
This CMMG .22 LR conversion bolt carrier group is a drop-in rimfire conversion designed to replace a standard AR15 5.56/.223 BCG and run .22 LR through a 5.56/.223 chambered upper using the included chamber adapter.
Built with a stainless steel bolt group, this conversion unit is compatible with most 5.56/.223 chambered rifles and installs like a standard BCG for quick caliber swaps.