Shop › CMMG ZEROED LPK AR15 CMMG ZEROED LPK AR15 $124.95 CMMG Zeroed Lower Parts Kit, Lower Receiver Parts Kit with Ambi Safety Selector, Fits AR15, Black 55CA642 Quantity: Add To Cart Added! CMMG Zeroed Lower Parts Kit, Lower Receiver Parts Kit with Ambi Safety Selector, Fits AR15, Black 55CA642