The stripped upper receiver is one of Aero's most popular products. Forged from 7075-T6 aluminum, this stripped upper is precision machined to mil-spec M16/M4 specifications and features M4 feed ramps. Match this upper with one of our AR-15 lower receivers for a solid dependable fit. It features M4 feed ramps and .50 take down pin holes. This upper receiver comes in FDE Cerakote finish. NOTE: Requires dust cover, forward assist, charging handle, barrel, handguard, gas block, muzzle device, gas tube and BCG (Bolt Carrier Group) to complete.