The Radical Firearms RF-15 Complete Lower Receiver is designed for serious firearms enthusiasts looking to build a custom AR-15. This 5.56 NATO compatible lower receiver features high-quality 7075 T6 MIL-SPEC forging and a Type III Class 2 hardcoat anodized finish, ensuring durability and performance. Included with the receiver are an M4 stock and A2 grip, providing a solid foundation for your next build. The Radical Firearms commitment to quality means you can rely on this lower receiver for both recreational and tactical applications.