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BKF AR15 18″ .223 Wylde Rifle Length Nitrided 416-R SPR Barrel W/ 15.5″ FFSSR M-LOK Rail (BKF)

(14 customer reviews)

Original price was: $434.30.Current price is: $260.58.

88 in 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 Slim Profile 15.5″ Slim FFSSR M-LOK Handguard W/ QD Mounts 3 & 9 O’clock on Rear and front
  • BKF AR15 18″ .223 Wylde Rifle Length Nitrided 416-R SPR Barrel 1/8 Twist
  • BKF .750 Low Profile Gas Block and Rifle 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 15.5″ Slim M-LOK FFSSR

  • Super Slim Profile (1.360″) inside diameter
  • Lightweight design (10oz)
  • Free Floated
  • QD Swivel mounting holes at the 3 and 9 oclock positions at front and rear
  • Picatinny rails at the 3, 6 and 9 oclock positions
  • M-LOK Compatible
  • Made in the USA!!

BKF AR15 18″ .223 Wylde Rifle Length Nitrided 416-R SPR Barrel Features:

This .223 Wylde chambered 18 inch barrel is machined from 416 Stainless Steel with a QPQ corrosion resistant finish.

Additional Info

Length – 18″

Material – 416R Stainless Steel

Profile – SPR

Finish – QPQ Nitride

Gas System Length – Rifle

Gas Block Journal – .750″

Twist Rate – 1:8 inches

Muzzle – 1/2×28 Threaded

Weight – 40oz

Other Info – HP and MPI Tested

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 4 lbs
Dimensions 28 × 4 × 4 in

14 reviews for BKF AR15 18″ .223 Wylde Rifle Length Nitrided 416-R SPR Barrel W/ 15.5″ FFSSR M-LOK Rail (BKF)

  1. Colt Warren (verified owner)

    This is an awesome upper!

  2. Chad H. (verified owner)

    Very fast free shipping and exactly what I ordered

  3. Anonymous (verified owner)

    Had a small problem with the feed ramps, probably just needs broken in, but had a few rounds that were getting stuck and scarred where the casing necks down. Tried a different lower and bolt and it did the same thing. Simple fix, just shoot it more and keep a reasonable amount of oil on it.

  4. Martin B. (verified owner)

    Love the handguard… and the craftsmanship is amazing…

  5. NELSON RODRIGUEZ (verified owner)

    Exactly as described and fast professional shipping.

  6. Stephen (verified owner)

    This is a nice piece. Product was as advertised. Barely broke it in last weekend, but so far impressed. Will be doing more business here.

  7. Larry Parks (verified owner)

    I am very happy with the BK Upper. I am waiting on the rest of the parts to complete the build. I am excited to take it to the range and shoot it.

  8. Michael J. (verified owner)

    This is an incredible buy & looks great too. I’m very happy with my purchase

  9. Ryan (verified owner)

  10. Anonymous (verified owner)

    Very happy with upper so far. Sub moa out of box!

  11. Alan B. (verified owner)

    Well made, high quality AR upper. Performs as advertised.

  12. a762x51mm (verified owner)

    I received another example of your fine firearms for a fair price. Now as soon as the scope comes in, I will get to put it to the test of accuracy.

  13. Alan B. (verified owner)

    I liked it so much that I bought 1/2 dozen of them. Well made & very accurate. The price & shipping are very good.

  14. dema983 (verified owner)

    Owned 4 years now. Running with the BKF trigger and lower parts kit. It’s a very accurate, tuff, versatile setup. Has been slung all through the TN mountains in all weather conditions and has never failed me in any way. Confidence in BKF has brought me back for yet again another upper purchase.

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