The M4E1 receiver set is a precision crafted combination designed for those seeking top-tier performance and reliability in their firearm build. This set includes a stripped lower receiver featuring an integrated trigger guard for added durability and ease of use. Paired with the assembled upper receiver, which undergoes an advanced forging process to ensure superior strength and a smooth, refined finish, this set provides an exceptional foundation for your custom build. Combining functionality with sleek aesthetics, the M4E1 receiver set is ideal for both experienced builders and first time assemblers, delivering a perfect blend of innovation and craftsmanship.

Threaded takedown pin detent recess - this feature enables users to effortlessly install the takedown pin detent and spring using a 4-40 set screw, effectively preventing the detents from being inadvertently launched across the room
Enhanced magwell flare - the magwell flare has been augmented to facilitate rapid and efficient magazine changes
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
Laser-engraved T-marks
The threaded bolt catch roll pin facilitates straightforward installation of the bolt catch and significantly reduces the risk of damaging the finish during the installation process
The pin is included
The integrated trigger guard design eliminates the risk of breaking the trigger guard tabs by incorporating the trigger guard into the lower receiver
This integration results in a stronger and more rigid platform for further development
The upper tension screw enables precise adjustment of the fit between the upper and lower receivers
This is achieved through a nylon-tipped tensioning set screw inserted into the grip tang of the lower receiver, ensuring a secure fit with any standard AR-15 upper receiver

Report incorrect product description

Reviews

Q & A

Retail Stock

Compliance

Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

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.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).