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The M4E1 Carbine – Monolithic strength and accuracy without the monolithic commitment.

The AR15 weapon system is an ever-evolving and modular system. That weapon system has now been enhanced by Aero Precision into the new M4E1 platform. The M4E1 upper receiver is precision-machined to our specifications and features M4 feed ramps and handguard mounting platform. The rail mounting surface and barrel nut area provide a much stiffer system than a standard receiver, giving you more accuracy out of your rifle. Lightweight by design, stronger through superior engineering, the M4E1 delivers monolithic accuracy in a lightweight package.

Built with the M4E1 Enhanced Upper Receiver

The M4E1 begins with our all new state-of-the-art forged upper receiver. The M4E1 upper receiver is a one-piece design combining the rail's mounting surface with the upper itself. By machining the rail's mounting surface into the upper itself we have condensed the parts needed to mount a free-floated rail to a mere 8 screws. The M4E1 rail system gives you options such as Keymod, M-LOK, and standard Picatinny, as well as lengths ranging from 7" to 15".

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Built with an AP Multi Caliber Lower Receiver

Our lower receivers are machined beyond industry standards. Learn more about our lower receiver features or shop now.

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AeroPrecision Rifles