DealAR15 M4 Flat Top Stripped Upper Receiver MIL 8625 Type III Class II hard coat anodized Dry Lube Coating Inside "No T-Markings" Laser Engraved M4 Feed Ramps Accepts all standard mil-spec parts Precision CNC machined from US certified 7075-T6 heat treated forgings. from Reading Armament (Product AR15SUR1) |