BKF M4 MOD-1 13″ M-LOK Cerakoted Builder Set – Freedom Flag

$799.99 $594.99

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New for 2019 is our BKF M4 MOD-1 forged receiver sets that is part of our new Premium Series. They available as a builders set or receiver set. The Premium Series will offer a vast number of BKF components that have been made with the AR builder in mind. Not only does the Premium Series offer extremely high quality products, but it also offers very competitive pricing. These are not any old AR15 forged receiver set. They feature BKF signature machined pocketing and enhanced aesthetics. All of the detail is machined to give this receiver set a refined look. This receiver set is the perfect starting place for any high quality build.

BKF AR15 M4 MOD-1 Stripped Lower Receiver Features: 

  • U.S.A. sourced 7075-T6 Aluminum
  • Forged then Machined for enhanced detail and aesthetic appearance.
  • Standard Bolt Catch Pin
  • Standard Trigger Guard Pin Holes
  • Standard trigger pin sizing (.156)
  • Weight: Lower 7.2 oz stripped
  • Deep Laser Engraved BKF logo

BKF AR15 M4 MOD-1 Stripped Upper Receiver Features: 

  • U.S.A. sourced 7075-T6 Aluminum
  • Forged then Machined for enhanced detail and aesthetic appearance
  • Upper receiver features M4 style feed ramps
  • Weight: Upper 6.7 oz Stripped
  • Made in the U.S.A.
  • Deep Laser Engraved T-Marks

BKF AR15 M4 MOD-1 13″ M-LOK Handguard Features:

The BKF AR15 M4 MOD-1 Rail M-LOK series provides an alternative aesthetically progressive design that is lightweight with our 7075-T6 Aluminum barrel nut and attach method. The innovative attachment of the rail and the barrel nut provides a solid lockup, a seamless, strong joint that requires no timed alignment to the barrel nut itself. All BKF M4 MOD-1 rails (and receivers for that matter) are designed with pocketed cutouts to further minimize weight. In addition, BKF M4 MOD-1 rails offer QD mounting at the rear 3,6 and 9 O’clock of the handguard.
  • Made from U.S.A. sourced 6061 Extrusion
  • U.S.A. sourced 7075-T6 Aluminum barrel nut as standard
  • M-LOK mounting solution
  • Free floating design
  • QD mounts on rear 3,6 and 9 o’clock positions
  • 1.3” Internal Diameter
  • 15” Rail with Aluminum nut and hardware (weight 9oz)
  • 1-5/16” crows foot tool or premium armorers wrench recommended for installation (Not Included)

Total weight of this 3 piece builder set is 23oz!!!

BKF Sopmod Mil-spec Carbine Stock Features:

Designed to fit MILSPEC Buffer tubes. The BKF SOPMOD Features a excellent cheekweld for optimum shooting positioning. Within the stocks frame are two water tight storage compartments for small items(batteries). The rubber padded buttplate provides a non-slip surface for consistent shoulder and cheek placement. BKF has taken features the users demand, and Offering them a light, compact buttstock at a very attractive price point. Perfect for your MK18 clone builds!

  • Mil-Spec
  • Rubber non-slip buttplate
  • Two watertight storage compartments
  • Stainless steel QD swivel mount (not Anti-Rotational)
  • Proudly Made in the USA

BKF MOD-1 AR15 Fluted 8 Position Anti-Tilt Carbine Length Buffer Tube Assembly Features:

  • Billet machined from 6061-T651 aluminum for tighter concentricity than a forging or impact extrusion to reduce potential for bolt carrier binding.
  • 8 position adjustment with machined indicators visible through any stock with a viewing port located at the stock latch pin. Extended positions, increment adjustments have a finer spaced length of pull.
  • Mil Spec extension diameter of 1.148, and thread diameter of 1.185
  • Carbine length
  • Extended carrier support flange that supports the carrier for better anti-tilt performance.
  • Self aligns with the buffer detent.
  • Fluted for a more aesthetic look
  • Chamfered edges on the stock guide ramps for better feel
  • 3 Drain holes at 6 O’clock
  • Weight 3.45 oz
  • Proudly made in the USA!!!


  • BKF AR15 M4 MOD-1 Stripped Lower Receiver
  • BKF AR15 M4 MOD-1 Stripped Upper Receiver 
  • BKF AR15 M4 MOD-1 15″ M-LOK Handguard
  • BKF Sopmod Mil-spec Carbine Stock
  • BKF MOD-1 AR15 Fluted 8 Position Anti-Tilt Carbine Length Buffer Tube Assembly
  • Magpul MOE grip 

Additional information

Weight 5 lbs
Dimensions 20 × 8 × 4 in
Barrel Length





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