Convert your 5.56/.223 AR-15 Rifle to shoot inexpensive .22LR with this CMMG .22LR AR-15 Conversion Kit. 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. Ships with (3) 25rd magazines. For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have proven to be the best choice for function. This .22 conversion kit for an AR15 can be installed in seconds.