DealBlemished Ground Zero Precision upper receivers are manufactured for us in the United States by a major military and NASA contract to U. S. Military Specification. Forged from 7075 T-6 Aluminum and hard coat type III class III anodized in matte black for durability and reliability in the most extreme of environments. Blemished stripped upper receivers may have light mars,scratches or defects in finish but are otherwise fully functional and in spec. Manufactured to U. S. Mil-Spec Forged 7075 T-6 Aluminum M-4 Upper Receiver with M-4 Feed Ramps 1913 Picatinny Rail Flat Top Multi-Caliber Capable Hard Coat Anodize Type III Class II Matte Black Finish from Ground Zero Precision |