The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as Aero's M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum and precision machined to work with all mil-spec AR15 parts.

FEATURES:

• The M4E1 Threaded Upper Receiver is designed to pair perfectly with Aero's new M4E1 Lower Receiver giving you a billet looking receiver set at a fraction of the billet price.
• New enhanced forging that gives the upper receiver a "billet look"
• New picatinny profile that blends seamlessly with Aero's Enhanced and ATLAS Series Handguards
• M4 Feedramps
• .250 takedown pin holes
• Includes threaded forward assist roll pin
• DOES NOT include port door or forward assist
• M4E1 Threaded Upper Receiver in Magpul
• Anodized Black or FDE Cerakote