Franklin Armory BFSIII M4-BLR Complete Lower Features The Franklin Armory BFSIII M4-BLR Complete Lower is built around the BFSIII Binary Safety Selector a proprietary fire control group that lets the shooter select safe standard semi-auto or one of two binary firing modes with a simple selector rotation. A specialized tension screw is integrated into the design to keep the upper and lower mated tightly reducing rattle and improving consistency shot to shot. The forged 7075-T6 aluminum receiver gives the lower the strength to handle the increased cycling of binary fire without sacrificing the light weight AR-pattern builders expect. Together these features make the BFSIII M4-BLR Complete Lower a dependable fire-control foundation for a pistol-format AR build. The lower ships complete with an SBM4 pistol brace already installed giving builders a functional shoulder-stabilized pistol platform without sourcing a separate brace. A black hardcoat anodized finish covers the receiver for corrosion resistance and a durable low-maintenance exterior that stands up to range use and outdoor conditions alike. It includes one 30-round magazine so the lower is ready to run as soon as an upper is mated to it. Backed by Franklin Armory s reputation for innovative fire control systems the BFSIII M4-BLR Complete Lower gives builders a complete ready-to-assemble lower with genuine added shooting versatility. Franklin Armory BFSIII M4-BLR Complete Lower Specifications Manufacturer: Franklin Armory Model: BFSIII M4-BLR Complete Lower Type: Complete Lower Caliber: Multi-Cal Capacity: 30+1 Finish: Black Hardcoat Anodized Receiver Material: Forged 7075-T6 Aluminum Stock/Brace: SBM4 Pistol Brace Safety Features: BFSIII Binary Safety Selector Weight: 3.75 lbs Available At: GrabAGun