The Anderson AM-15 Stripped Lower Receiver is made with superior quality for less! Anderson 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. This Lower Receiver comes in type III black hard anodize, and a closed Trigger guard. Don't over pay for the same lower receiver with a different logo and use your money saved elsewhere on your build! Pair this with one of Anderson's Upper Receivers for a solid fit for your AM-15 build!