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. This Lower Receiver comes in type III black hard anodize, with an Open Trigger. Comes with milspec trigger, lower parts and M4 milspec stock kit installed. **OPTIONAL**: UPGRADE STOCK to a JE Machine Tech SOPMOD stock