This is the CMMG Bravo .22LR conversion kit for AR-15 rifles. This kit comes with a drop-in .22LR bolt assembly and three (3) 25-round magazines. 

CMMG made the installation process easy! Just swap this drop-in conversion with the bolt carrier group from your 5.56/.223 chambered rifle and you will be ready to shoot 22LR.

For best performance use a round style hammer as notched hammers can cause function issues.

CMMG recommends 36-grain .22LR plated nose bullets for maximum reliability.