Yankee Hill Machine Co., Inc. Ar-15 5.56 16" Black Diamond Specter Upper Receiver

Flattop upper comes with high-end custom features and accessories already installed, ready to snap on the mil-spec lower receiver of your choice. Comes fully assembled with bolt/carrier, charging handle, tactical handguard, gas block, and barrel.Features a free-floated Diamond handguard with uniquely-patterned holes machined between the rails to reduce weight and enhance barrel cooling. Four full-length MIL-STD 1913 Picatinny rails have individually marked slots for quick reference. The handguard bridges the gap to the front of the receiver to form one continuous, uninterrupted top rail; extends over the low-profile gas block for a smooth, streamlined appearance. Specter XL Upper features Mfg: Yankee Hill Machine Co., Inc. SPECS: Receiver 7075 T6 aluminum alloy, mil-spec Type III hardcoat anodized finish, matte black. Barrel Chrome-moly vanadium steel alloy, heat treated to Rc 25-32, matte black finish. Chrome-lined. 16" (40.6cm) long. 1-9" twist, chambered for 5.56mm NATO. Handguard &ndas