Franklin Armory FAI-15 BFSIII .300 AAC Blackout AR Pistol, 10.5 in Barrel, Binary Trigger, Free-Float M-LOK, 40+1 Capacity
This Franklin Armory FAI-15 BFSIII is a .300 AAC Blackout AR-pattern pistol built around a 10.5 in barrel with a threaded muzzle and spiral-ported brake. It pairs a slick-side billet-style upper and a free-float M-LOK handguard with a continuous top Picatinny rail. The BFSIII binary fire control group with ambidextrous three-position selector and cancel-on-release adds a standout feature set, while the brace-equipped rear keeps the package compact and controllable.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape with minor, superficial scratches and blemishes.
What’s Included
- Franklin Armory FAI-15 BFSIII .300 AAC Blackout AR pistol
- 1x 30-round Magpul PMAG AR 300 B (300 BLK)
- 1x 40-round Magpul PMAG GEN M3 (5.56x45)
The heart of this pistol is Franklin Armory’s BFSIII binary trigger with a curved shoe. It uses a three-position ambidextrous selector for Safe, Semi, and Binary modes, and includes a cancel-on-release capability for added control of the binary function.
The upper is a slick-side billet-style design without a forward assist or ejection-port cover. A continuous 1913 Picatinny rail spans the receiver and handguard for mounting options, while the free-float aluminum M-LOK handguard includes short 1913 sections. The handguard features a prominent white .300 stencil for quick caliber identification.
The 10.5 in barrel is threaded and fitted with a spiral-ported muzzle brake. The direct impingement operating system and Type III hard-coat anodized 7075-T6 aluminum receivers deliver a proven AR-15 pattern foundation in a compact .300 BLK format. There are no sights installed.
A brace-style rear support rides on a carbine-length receiver extension, and the pistol uses an A2-style polymer grip. The magazine well carries a white skull graphic, adding a distinctive visual touch. Stated capacity is 40+1, and the pistol comes with both a dedicated 300 BLK PMAG and an extended GEN M3 PMAG.