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MK12 Barrel
MK12 Barrel

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Our Price: $450.00

Price with Selected Options: $450.00

Stock Status:(Out of Stock)
Availability:: Currently Unavailable
Product Code: MK12-PN-MK12B

Gas Block:

Barrel Nut:

Do not choose if you are ordering a CMR rail with with your order, as the barrel nut is included.

Gas Tube:

Muzzle Devices (NO pin/weld avail.):

Custom Cerakote Options:

"HBAR" Engraved on Barrel?*:


MK12 Barrel

These are Crane Spec. MK12 barrels. These barrels are the result of tens of thousands of dollars in development done by the U.S. government to give our Special Operations guys the best weapon system they can have. We have spoken with many riflemen who have used these barrels and carried them in combat and have found unanimous satisfaction with their reliability and accuracy.



Material: 416R Stainless

Barrel extension: M4 feed ramps

Chamber: optimized for use with MK262 (Black Hills 77gr equivalent)

Twist: 1 in 7 right hand

Contour: for use with OPS inc.

Length: 18 in and threaded 1/2x28 for use with most common muzzle devices

Weight: 2 lbs 6.3 oz

*****Centurion Arms barrels require no further break in*****

***Requires gunsmith installation

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Amazing Barrel and Company April 2, 2020
Reviewer: Adam P. from Wylie, TX United States  
First off...Centurion Arms is a great company.  Very helpful and quick to respond on any questions I had.  There was an item that was misplaced during shipping and I emailed them in regards to that.  Corrie responded within 15 minutes apologizing and 10 minutes after that I received tracking information and the part was delivered on my door step the next day on a Saturday.

No for the barrel itself.  It is amazing.  Extremely tight fit into the upper receiver.  We had to get a soft hammer and tap it into place.  I do all my own hand loads, especially for the 77 grain projectiles.  Out of several tests loads, I saw groups ranging from 1/2", 7/16", and 3/8" at 100 yards with different load calculations and projectile manufactures.  As Bill said in a previous review...it does not get better then that.  

I highly recommend this barrel in any MK12 build.  Amazing barrel and amazing company.  I look forward to ordering more products from Centurion Arms.

  1 of 1 people found the following review helpful:
5 of 5 The Real Deal September 18, 2017
Reviewer: Bill Bronaugh from Easton, MD MarylandUnited States  
Monty and his wife, Corrie, are the real deal.  I couldnt write enough to convey their integrity to you here but when you spend money with Centurion rest assured that your money is truly going to people who deserve it.  Simply the best people Ive had the distinct pleasure of doing business with.
My Mk12 barrel shoots 4 rounds in a 3/8" cluster at 100 meters on its first trip to my range. Folks, now it just dont get much better than that. The machining of the chamber is artfully done as is the outside. Its very clean and the Cerakote well executed. I also had the FSB pinned and also opted for the Ops Inc and to say Im pleased is an understatement.  Its perfection and thats about all I can really say.
Centurion Arms deserves our support.