Aero Precision X15 AR15 Stripped AR15 Lower Receiver

The Aero Precision AR15 Stripped Lower Receiver Gen 2 in black is the foundation for a custom AR15 build, designed to mil-spec standards that ensure compatibility with standard components and proper interface tolerances. As a stripped lower receiver, this component serves as the regulated firearm portion of the AR platform, housing the trigger group, magazine well, and buffer tube assembly—making it the logical starting point for builders who want to assemble the upper receiver, bolt carrier group, and furniture to their exact specifications.

Machined to mil-spec dimensions, the Gen 2 lower receiver features a flared magwell that reduces friction during rapid magazine changes and increases usability during high-round-count range sessions or training scenarios. The integrated upper tension screw maintains proper fit between lower and upper receiver, eliminating rattle and ensuring consistent zero retention across extended shooting strings. At 0.69 lbs, this stripped lower is lightweight without sacrificing rigidity, contributing to overall system balance when paired with your choice of upper receiver and furniture. The black anodized finish provides corrosion resistance suitable for indoor and outdoor environments.

This platform suits law enforcement and military personnel, competitive shooters, and experienced AR builders seeking a proven foundation for 5.56 NATO, .223 Remington, or specialized caliber conversions via upper receiver swap. Whether assembling a patrol carbine, precision rifle, or dedicated training platform, the AR15 lower receiver is the core component that defines the final build's ergonomics, trigger performance, and magazine compatibility. Aero Precision's Gen 2 iteration addresses feedback from the original design, optimizing the magwell geometry and receiver dimensions for faster, more intuitive operation under demanding conditions.