“TacFire Stripped Upper Receiver for AR-15 5.56x45mm” has been added to your cart. View cart HomeGun PartsAR15 PartsAR15 UppersCMMG Upper Receiver Assembly for Mk4/ AR15 Armor BlackCMMG Upper Receiver Assembly for Mk4/ AR15 Armor Black$148.00 CMMG Upper Receiver Assembly for Mk4/ AR15 Armor Black Additional information UPC 810097506329 Manufacturer CMMG Manufacturer Part Number 55BA290-AB 11 in stock CMMG Upper Receiver Assembly for Mk4/ AR15 Armor Black quantity Buy now Add to WishlistRemove from Wishlist Add to Wishlist