The M4E1 lower receiver combines the visual appeal of billet construction with the strength of a forged design. Engineered from 7075-T6 aluminum, it maintains compatibility with all mil-spec AR-15 components. Beyond its aesthetic enhancements, this custom-engineered design offers a competitive alternative to higher-priced billet options. Additionally, several functional features have been integrated into the lower receiver to streamline the assembly process for home builders.

Facilitates the installation of the takedown pin detent and spring utilizing a 4-40 set screw, effectively preventing the unintentional ejection of detents
Enhanced magwell flare - the magwell has been engineered with an increased flare to facilitate rapid and efficient magazine exchanges
The component is precisely marked and milled to accommodate short throw safety selectors, while maintaining compatibility with standard selectors
Facilitates straightforward installation of the bolt catch while significantly reducing the risk of finish damage during the installation process
Includes pin
Assembly requires a 1/16 inches hex key
The integrated trigger guard design eliminates the risk of breaking trigger guard tabs by incorporating the trigger guard directly into the lower receiver
This integration results in a more robust and rigid platform for further development
Upper tension screw - this component enables precise adjustment of the fit between the upper and lower receivers
It utilizes a nylon-tipped tensioning set screw, which is inserted into the grip tang of the lower receiver
This mechanism ensures a secure and tight fit with any standard AR-15 upper receiver

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All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Magazines will be removed from firearms when shipping to states with magazine capacity restrictions.

Must be 21 or older to purchase.

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