“YHM AR-15 STRIPPED LOWER – RECEIVER BILLET BLACK” has been added to your cart. View cart HomeGun PartsAR15 PartsAR15 LowersLower Receiver Mk4/AR15 Armor BlackLower Receiver Mk4/AR15 Armor Black$126.00 Lower Receiver Mk4/AR15 Armor Black Additional information UPC 810097506466 Manufacturer CMMG Manufacturer Part Number 55CA102-AB Product Type Stripped Action Semi-Auto Caliber/Gauge .223 REM/5.56 NATO Model MK4 17 in stock Lower Receiver Mk4/AR15 Armor Black quantity Buy now Add to WishlistRemove from Wishlist Add to Wishlist