The Franklin Armory FAI-15 Stripped Lower Receiver is a forged 7075-T6 aluminum AR-15 foundation designed specifically for builds using Franklin Armory’s Binary Firing System and compatible binary triggers. Precision machined to mil-spec dimensions and finished in hard coat Type III anodizing, this lower offers a durable, corrosion-resistant base that integrates seamlessly with standard AR-15 components.

This FAI-15 lower features Binary Mode selector engraving that clearly marks the fire control positions for safe, semi, and binary operation, simplifying setup and use with BFS III trigger systems. The included specialized tension screw allows you to fine-tune the fit between upper and lower receivers for a solid, rattle-free feel, making it an excellent choice for range rifles, training carbines, or competition-focused builds. Franklin Armory’s attention to detail and commitment to innovation are evident in every aspect of this purpose-built receiver.

Key Features:

• Manufacturer: Franklin Armory
• Model: FAI-15 Stripped Lower Receiver
• Caliber: Multi-Cal
• Condition: New
• Action: Semi-Automatic
• Unique Features: Binary Mode Selector Engraving, Specialized Tension Screw Included, Mil-Spec Compatible