The M4E1 threaded upper receiver showcases a bold new angular machined design that distinguishes it from traditional mil-spec upper receivers. Featuring the same enhanced body profile as our M4E1 Enhanced Upper Receiver, this model is uniquely threaded to accept a standard AR-15 barrel nut. Crafted from robust 7075-T6 aluminum, it is precision-machined to ensure perfect compatibility with all mil-spec AR-15 components. Additionally, the receiver comes with the port door and forward assist pre-installed for added convenience. Designed to pair flawlessly with our new M4E1 Lower Receiver, the M4E1 threaded upper receiver delivers the premium look and performance of a billet receiver set, all at a fraction of the cost, making it an ideal choice for those seeking exceptional quality and value.

Features an enhanced forging that gives the upper receiver a billet look for improved aesthetics
Has a new picatinny profile that blends seamlessly with the enhanced and Atlas series handguards for a streamlined look and performance
M4 feedramps are included to ensure reliable feeding of ammunition
The set features 3/4 inches takedown pin holes for precise fitment
Features laser-engraved t-marks for precise and clear markings
The package includes a threaded forward assist roll pin for secure assembly
The package includes a port door and a forward assist for smoother operation of the firearm

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