Anderson Manufacturing Lower Receivers are completely CNC machined in-house using 7075 T6 aluminum. Manufacturing allows to monitor Anderson's parts from start to finish to ensure high-quality products for customers. Making parts on-site, here in Hebron, KY, also allows Anderson Manufacturing to keep the prices affordable. Machined to Military Specifications standards and marked "Multi-Cal" to be used with multiple calibers on the AR-15 platform. This Lower Receiver with Trump Fight Logo comes in type III Black hard anodizing with an open trigger.