Precision-Machined 7075 Aluminum Forging For Superb Strength & Exact Dimensions

Semi-auto, small-pin lower receiver offers features usually found only on custom-machined specialty receivers—for the price of a basic, mil-spec receiver. Perfect for building a custom AR in the traditional .223/5.56mm chambering, or a special-purpose rifle in 6.5mm, 6.8mm, 9mm, or other caliber that fits a standard AR-15 receiver. Forged from high-grade 7075 T6 aluminum alloy for superb strength. Precision CNC machined to final dimensions with tolerances of less than .001", so it’s ready to accept the combination of mil-spec parts that fulfill your requirements. Magazine well is wire-EDM machined with a flared opening, ultra-smooth interior surfaces, and square corners for snag-free magazine insertion. Serrations cut into the front of the receiver provide an extra-secure gripping surface when the support hand is placed on the high magwell. Standard .154" holes for hammer and trigger pins let you install the aftermarket trigger of your choice; .250" pivot and takedown pin holes for compatibility with a broad range of upper receivers. Diamond-cut engraving produces the crisp, clean, serial number, logo, and markings without inducing unwanted stress in the metal caused by other methods. Hardcoat anodized to MIL-A-8625 Type III Class 2 spec to ensure superb surface hardness, before application of a tough, commercial-grade Teflon® coating to resist scratches, scuffs, and dings.