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BKF AR15 18″ 6.5 Grendel Rifle Length Nitrided 416-R SPR Barrel

(9 customer reviews)


37 in stock (can be backordered)


This 6.5 Grendel Type II chambered 18 inch barrel is machined from 416 Stainless Steel with a QPQ corrosion resistant finish. This BKF 416-R Barrel features a FailZero Nickel Boron Coated Extended M4 Feed Ramp Extension.

This barrel features a longer .750” profile dimension necessary for proper installation of the OPS Inc 12th model collar and suppressor.

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 Threads – 5/8×24

Weight – 41oz

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 2.5 lbs
Dimensions 20 × 4 × 4 in

9 reviews for BKF AR15 18″ 6.5 Grendel Rifle Length Nitrided 416-R SPR Barrel

  1. Elijah (verified owner)

  2. William M. (verified owner)

    This is a very nice barrel, You can tell right away that it is high quality, The feed ramps are cut perfectly and the coating feels great. It’s not too heavy so that helps keep my hunting rifle on the lighter side as well.

  3. Robert (verified owner)

    Have not fired yet but the barrel is in great shape, shipped quickly.

  4. Joey M. (verified owner)

  5. Mark H. (verified owner)

    Excellent quality and workmanship. The rifle length gas system recoils softer than my mid length gas systems. Functioned flawlessly ejecting cases at 3-3:30. Extremely accurate! First three rounds group 1/4″ center to center at 25 meters. A dime covers the 3 shot group.

  6. TONY N. (verified owner)

  7. Jordan T. (verified owner)

  8. Travis B. (verified owner)

    Looks nice haven’t installed yet

  9. Dale (verified owner)

    First, this is my second time dealing with BKF and I must say their customer service is awesome! As for the barrel … after seasoning of approximately 20 rounds and dialing in the optics the barrel performed sub MOA as long as I did my part! Awesome product with awesome service! Highly recommend business with BKF!

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