The Franklin Armory BFSIII-M4 in 5.56mm NATO (MPN 00-10048-BLK) pairs a 16-inch midlength barrel with a Binary Firing System III (BFS III) trigger, giving shooters a semi-automatic rifle that fires one round on the trigger pull and a second round on the trigger release. Franklin Armory ships the receiver optic-ready, with no fixed sights installed. The rifle feeds from an included 30-round magazine. Among modern sporting rifles in the AR rifles category, the BFSIII-M4 favors shooters who want the Binary Firing System III trigger, which remains classified as semi-automatic under ATF review.

Key Specifications

• Chambered in .223 Rem/5.56 NATO.
• Features a 16-inch midlength barrel.
• Equipped with a Binary Firing System III (BFS III) trigger, firing one round on pull and one on release.
• The receiver is optic-ready, with no fixed sights.
• Feeds from an included magazine with a 30+1 capacity.
• Weighs approximately 12.47 pounds shipping weight.
• Sights: Optics Ready.
• Included magazines: 1 30 rd..
• The barrel is an LTW contour.
• Includes a 15-inch FST handguard.
• The bolt carrier is salt bath nitride finished.
• Runs a midlength gas system with a low-profile gas block.
• Capped with an A2 muzzle device.

Frequently Asked Questions

What is the Binary Firing System III? A trigger that fires one round when pulled and a second round when released, while remaining classified as semi-automatic.

Does this rifle include an optic? No, the receiver is optic-ready but ships without a mounted optic.

Buy the Franklin Armory BFSIII-M4

The Binary Firing System III trigger on a midlength 5.56 platform is exactly what the BFSIII-M4 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.