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 our 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.

The M4E1 Threaded Upper Receiver is designed to pair perfectly with the Aero Precision 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 our Enhanced and ATLAS Series Handguards

M4 Feedramps

.250 takedown pin holes

Laser engraved T-marks

Includes threaded forward assist roll pin

DOES NOT include port door or forward assist