Franklin Armory FAI-15 Stripped Lower Features Built around the BFSIII platform the FAI-15 stripped lower delivers a forged 7075-T6 base that is both lightweight and rigid making it an ideal starting point for a performance-focused AR build. The hardcoat anodized finish adds long-wearing protection while keeping the overall look clean and professional. Binary markings provide the correct visual layout for dedicated builds that are meant to match the system they are designed around. For builders who want a more refined receiver fit the specialized tension screw helps reduce movement between the upper and lower for a tighter feel and improved consistency. The Elite Binary Trigger Equipped configuration supports a complete BFSIII-style setup without requiring additional receiver modifications. This binary marked forged lower is a strong match for builders who want a premium foundation that is properly configured from the start. Franklin Armory FAI-15 Stripped Lower Specifications Manufacturer: Franklin Armory Model: FAI-15 Stripped Lower Family: BFSIII Series Caliber: .223 Rem 5.56 NATO Action: Semi-Auto Receiver Material: Forged 7075-T6 Aluminum Finish: Hardcoat Anodized Finish Color: Black Trigger Configuration: Elite Binary Trigger Equipped Tensioning: Specialized tension screw Shipping Weight: 0.755 lbs.