The Angstadt Arms Stripped Lower Receiver for Glock is designed for their AR-9s and AR-15s with Glock magazines. It is machined from aircraft-grade 7075-T6 aluminum and features a matte black hard-coat anodized finish. These receivers are available in multiple calibers, such as 9mm, 45 ACP, 40 S&W, and 357 SIG. They are designed for a dedicated caliber bolt carrier assembly and a standard AR-15 hammer. The Angstadt Arms Stripped Lower Receiver for Glock features an oversized trigger guard, a threaded bolt catch screw, and a flared mag-well for faster reloads and accepts all aftermarket Glock double stack magazines. The lower will work with any mil-spec upper, making it great as a replacement part or an upgrade for your existing AR-9/AR-15 build.