Franklin Armory BFSIII M4 Binary Trigger lower receiver is built from forged 7075-T6 aluminum and finished in Type III hardcoat anodized black for durability. Designed for M4 / AR-15 pattern setups, it integrates the Franklin Armory Binary Firing System III for rapid follow-up shots and improved control with standard AR-style controls.

Key features

• Forged 7075-T6 aluminum receiver with Type III hardcoat anodized black finish
• Built-in Franklin Armory Binary Firing System III (BFSIII) for binary trigger operation
• M4 / AR-15 pattern compatible for use with a 5.56 NATO upper
• Specialized tension screw helps eliminate upper/lower play
• M4-style carbine receiver extension compatible with a reinforced 6-position collapsible stock setup
• Supports standard AR magazines with a 30-round configuration and restricted-state options (10/20 or 10/30)

Upgrade your M4 / AR-15 pattern build with a BFSIII binary-trigger lower receiver engineered for fit, function, and hard-use durability.