The M4E1 threaded upper receiver is a premium component for AR-15 builds, featuring a unique angular machined design that surpasses traditional mil-spec upper receivers. It maintains the enhanced body profile of the M4E1 enhanced upper receiver while introducing a threaded design for seamless compatibility with a standard AR-15 barrel nut. Constructed from durable 7075-T6 aluminum, it offers exceptional strength and durability. Precision machining ensures compatibility with all mil-spec AR-15 parts. Ideal for upgrades or new builds, the M4E1 threaded upper receiver combines style, functionality and reliability for firearm enthusiasts.

The newly improved forging process imparts a "billet look" to the upper receiver
The new picatinny profile integrates seamlessly with our enhanced and Atlas series handguards
M4 feed ramps
0.250 inches takedown pin holes
Incorporates a threaded forward assist roll pin
Excludes port door and forward assist

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