Includes a Completely Assembled Lower, Lower Parts Kit, and Pistol Buffer Tube Assembly The AM-15 Stripped Lower Receiver is American made with superior quality for less! Our lower Receivers are CNC machined from a high-strength, 7075 T6 aluminum forging for reliable performance and outstanding durability. Machined to Military Specifications & Standards and marked "Multi-Cal " to be used with multiple calibers on the AR-15 platform. Don't over pay for a lower receiver! Use the money you save elsewhere on your build! Pair this with one of our Upper Receivers for a solid fit for your AM-15 build! Comes with Pistol Grip Installed.