Quick view CMMG Cmmg Replacement Barrel, Cmmg 22d7c6c Brl/bolt Grp Kit 22lr 16.1 M4 $313.88 Everything you need to convert your existing upper to a dedicated.22lr.Just purchase a magazine and you are ready to go.For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have... Compare Add to Cart