BKF AR15 8″ 300 BLK Pistol length 1/7 Twist Barrel w/ 7.25″ Hybrid M-LOK Handguard (BKF W/ Pinned Gas Block)

(5 customer reviews)

Original price was: $379.96.Current price is: $294.47.

Out of stock


This product is 100% Made in the USA! Our gas tubes, gas blocks and even roll pins are all proudly manufactured in the US. All Complete uppers are headspaced prior to shipping and test fired.


  • BKF M4 Assembled Upper Receiver w/ T-Marks
  • Parallax Tactical 7.25″ Slim Hybrid Profile M-LOK Handguard
  • BKF AR15 8″ 300 BLK DRP Profile Pistol Length 4150 CMV 1/7 Twist Nitride Barrel W/ Pinned Gas Block
  • BKF Pinned .750 Low Profile Gas Block and Pistol length Nitride Gas Tube
  • BKF A2 Flash Hider
  • Product comes assembled
  • No BCG or Charging Handle

BKF M4 Assembled Upper Features:

  • M4 Feedramps
  • 7075-T6 aluminum
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Thermal Fit Upper W/ Oversized Lugs for tight fitment with most receivers
  • Type 3 Hard Coat Anodizing
  • Made in the USA
  • Forward assist and dust cover installed

Parallax Tactical 7.25″ Slim Hybrid M-LOK

  • Super Slim Profile (1.360″) inside diameter
  • QD at rear 3 and 9 o’clock positions (8oz)
  • M-LOK Compatible
  • Made in the USA!!!

BKF AR15 8″ 300 BLK DRP Profile Pistol Length 4150 CMV 1/7 Twist Barrel W/ Pinned Gas Block Features:

This BKF 300 Blackout chambered 8 inch DRP (Distinct Rigid Profile) Profile Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. This barrel includes a QPQ .750 Low-Pro gas block drilled for a 1/8″ pin which is included. This pinning insures that your gas block never comes loose once installed.

Additional Info

Length – 8″

Material – 4150 Chrome Moly Vanadium

Profile – DRP (Distinct Rigid Profile)

Finish – QPQ Corrosion Resistant

Gas System Length – Pistol

Gas Block Journal – .750″

Twist Rate – 1:7 inches

Muzzle – 5/8″x24 Threaded

Weight – 19oz

All NFA/ATF Rules Apply
You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when permanently attaching a muzzle device extending the length to 16 inches. B. Kings Firearms barrels are manufactured by a Top Tier Barrel Manufacturer to our specifications. B. Kings Firearms 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 3 lbs
Dimensions 20 × 4 × 4 in

5 reviews for BKF AR15 8″ 300 BLK Pistol length 1/7 Twist Barrel w/ 7.25″ Hybrid M-LOK Handguard (BKF W/ Pinned Gas Block)

  1. Chris E. (verified owner)

    Product exactly as described. Looks great. Well built. Just add a lower and let ‘er rip.

  2. stephen Clack (verified owner)

  3. Anonymous (verified owner)

    Upper looks built very well. Very satisfied with the upper for the price. High quality parts used.

  4. Anonymous (verified owner)

    Even though this a complete budget pistol lower I used it to mate up to BKF complete 300 Blackout 8″ upper, BKF standard M16 BCG no logo, a Warhammer Mod 2 charging handle and BKF Ar15 Nickel Teflon Reduced Power Fire Control Group – Complete (Polished) (3.5lbs-4.5lbs).

    The fit was perfect, there was no slop in upper and lower halves. The trigger assembly was smooth. I shot about 100 rounds without any problems. Was able to sight in my red dot at 25 yards using remanufactured ammo three shoot group with dime hole results from a bench setting .

    I was able to duplicate the results 4 times. I am more than pleased with the quality of BKF products would most certainly recommend to anyone wanting to build a quality AR. Also quick delivery on the shipping. I have no affiliation with BKF products what so ever.

  5. Blake G. (verified owner)

    From here on out my go to place. A+

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