Aero Precision APAR700201C M4E1 Threaded Receiver 5.56x45mm NATO 7075T6 Aluminum Black Anodized Receiver for AR15

The M4E1 Threaded Upper Receiver features an angular machined design that helps it stand apart from standard milspec upper receivers. It is threaded to accept a standard AR15 barrel nut and forged from 7075T6 aluminum and precision machined to work with all milspec AR15 parts. The M4E1 features a picatinny profile M4 feedramps and .250 takedown pin holes. NOTE: Requires dust cover forward assist charging handle barrel handguard gas block muzzle device gas tube and BCG Bolt Carrier Group to complete.