Franklin Armory M4 Binary Lower Receiver, Black

Franklin Armory M4 Binary Lower Receiver

The Franklin Armory M4 Binary Lower Receiver represents a thoughtful approach to modern sporting rifle design. Built from forged 7075-T6 aluminum and finished with hard-coat Type III anodizing, this lower receiver combines durability with precision engineering.

Key Features

Trigger System

• Binary Firing System (BFSIII) trigger mechanism
• Fires on both trigger press and release for increased rate of fire
• Designed for shooters seeking enhanced trigger functionality

Construction & Materials

• Forged 7075-T6 aluminum for strength and reliability
• Hard-coat Type III black anodize finish
• Specialized tension screw eliminates upper/lower receiver play
• Reinforced six-position collapsible M4-style stock

Ergonomics & Controls

• A2 pistol grip for comfortable, familiar handling
• Multiple rear sling mounting points
• Angled heel design for smoother shooting transitions
• Aluminum carbine-length receiver extension

Magazine System

• Includes 30-round stainless steel magazine with Marlube finish
• Anti-tilt follower for reliable feeding
• 5.56 NATO chambering
• Compliant 10/20 and 10/30 magazine options available for restricted states

Design Philosophy

This lower receiver exemplifies the principle that a sporting rifle should function reliably while offering the shooter meaningful control and customization options. The binary trigger system appeals to those seeking a different shooting experience, while the robust construction ensures years of dependable service.