The M4E1 receiver set is a precision engineered combination designed for enthusiasts seeking superior performance and reliability. It includes a stripped lower receiver with an integrated trigger guard for enhanced durability and ease of use. The assembled upper receiver features an enhanced forging process for exceptional strength and a refined finish. Together, these components provide a robust foundation for building a high-quality firearm, offering both functionality and aesthetic appeal. Suitable for both seasoned builders and first time assemblers, the M4E1 receiver set delivers a perfect balance 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

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