Diamondhead USA manufactures industry-leading products right here in western Massachusetts. The DH-15 Fixed Mag Lower is a forged aluminum receiver with black Mil-Spec Type III Hardcoat Anodized Finish, and is compliant for all 50 states including NY, CT, MA, NJ, and CA. Featuring a fixed 10-round Magpul® PMAG, this receiver can be built into a Massachusetts-legal AR pistol or rifle. The DH-15 Fixed Mag Lower is completely built with all necessary lower parts, and features a Mil-Spec M4 receiver extension that is compatible with many stock and pistol brace options. Compatible with many different AR-15 upper receiver receivers in a variety of calibers, including .223 Rem, 5.56×45 NATO, .300 AAC Blackout, and many more.