BKF M4 MOD-1 M4 12.5″ 1/7 Twist 5.56 Nato SBA3 Pistol

(1 customer review)


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BKF M4 MOD-1 AR15 12.5″ 1/7 Twist 5.56 Nato SBA3 Pistol – Anodized Features: 

  • Manufacturer: B. King’s Firearms
  • Model: M4 MOD-1
  • Caliber: 5.56 Nato (Marked Multi)
  • Length: 12.5″
  • Gas System: Carbine
  • Weight: 5lb 3oz


  • BKF AR15 M4 MOD-1 11″ M-LOK Builder Set
  • BKF AR15 12.5″ 5.56 Nato Government Carbine Length 4150 CMV 1/7 Twist Barrel W/ Pinned Gas Block
  • BKF Full Auto BCG HPT/MPI Carp 185 Bolt and billet extractor
  • SB Tactical SBA3 pistol brace
  • BKF Anti-Tilt 8 position H1 Carbine Buffer Assembly
  • Magpul Moe pistol grip
  • BKF Enhanced Lower Parts Kit W/ Combat Control Kit (45/60 ambi safety, oversized bolt catch and extended textured mag release)
  • Radian Ambi Charging Handle
  • BKF Upper Parts Kit
  • BKF Melonite Gas Tube
  • BKF Nitride .750 Gas BLock

B. Kings Firearms barrels are manufactured by a Top Tier Barrel Manufacturer to our specifications. Our barrels are made for combat and heavy duty use. We rate all of our Pinned Gas Block models for full auto use. We guarantee 1 MOA or better on all BKF barrels when used with match grade ammunition.

Additional information

Weight 10 lbs
Dimensions 38 × 10 × 6 in

1 review for BKF M4 MOD-1 M4 12.5″ 1/7 Twist 5.56 Nato SBA3 Pistol

  1. Jonathan Suttles (verified owner)

    Finally got to shoot this thing today for first time. Love the feel of it and it shoots great….when it shoots. Every other round was getting a light primer strike. If not for that, I’d give it a 5/5 for sure. Any idea what could be causing this? It wasn’t the ammo as it would run fine in my other AR as well as my friend’s AR.

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