The AM-15 Elite Stripped Lower Receiver is American made with superior quality for less! Anderson’s 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. Dimension is 1.55 X 6.25 X 10.95.