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Upgrade your AR-15 with the Brownells 5.56 NATO MK12 Profile barrel. 🛠️ Precision-crafted for accuracy and suppressor compatibility!
  • BROWNELLS BARREL 5.56MM NATO 18 1-7 RIFLE LENGTH BLACK
  • BROWNELLS BARREL 5.56MM NATO 18 1-7 RIFLE LENGTH BLACK
  • BROWNELLS BARREL 5.56MM NATO 18 1-7 RIFLE LENGTH BLACK

BROWNELLS AR-15 5.56MM NATO MK 12 PROFILE - BROWNELLS BARREL 5.56MM NATO 18 1-7 RIFLE LENGTH BLACK

050806029514 100026221

Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The Brownells 5.56 NATO MK12 Profile AR-15 barrel is an 18-inch stainless-steel precision barrel, stress-relieved and made in the USA.
  2. It features a 1:7 twist rate, is suppressor ready with 1/2x28 TPI threads, and has an 11-degree target crown.
  3. The barrel is designed for the MK12 platform, undergoes magnetic-particle inspection for quality assurance, and has a nitride finish for durability.

Attributes

  • Cartridge: 5.56 mm NATO
  • Contour: MK12
  • Finish: Black
  • Gas System Length: Rifle
  • Length: 18''
  • Muzzle Threads: 1/2-28
  • Twist: 1-7
  • Weapon type: AR-15
  • Delivery weight: 0.907kg
  • Shipping height: 51mm
  • Shipping width: 51mm
  • Shipping length: 483mm
  • UPC: 050806029514

Item details

Made in USA
US export classification: 0A501.c
  • Specifications:
  • Cartridge: 5.56 mm NATO
  • Contour: MK12
  • Finish: Black
  • Gas System Length: Rifle
  • Length: 18''
  • Make: AR-15
  • Muzzle Threads: 1/2-28
  • Twist: 1-7
299.9 299.9 1 GBP
299.9 GBP £299.90

Prices inclusive of duty & VAT.

Product no.: 100026221

Mfr. No.: BN-15B57R18NCQ-

050806029514 The MK12 platform received fame for its use with US Special Operations groups as a semi-automatic precision rifle, and one of the essential elements of the platform is now offered as the Brownells 5.56 NATO MK12 Profile AR-15 barrel. The Brownells 5.56 NATO MK12 Profile AR-15 barrel are completely machined and finished by craftsmen in the USA and are made using stainless-steel bar stock that's 416-R certified steel and completely stress relieved. The barrels measure 18 inches long. Features 1:7 rate of twist Suppressor ready with 1/2x28 TPI threads Features 11-degree target crown Each barrel undergoes magnetic-particle inspection for quality The Brownells 5.56 NATO MK12 Profile AR-15 barrel also features a complete nitride treatment, as well as precision machining for perfect suppressor compatibility.
In stock - Is a 'Call to order' product.
Is a 'Call to order' product.
  • Specifications:
  • Cartridge: 5.56 mm NATO
  • Contour: MK12
  • Finish: Black
  • Gas System Length: Rifle
  • Length: 18''
  • Make: AR-15
  • Muzzle Threads: 1/2-28
  • Twist: 1-7

Description:

A MK12-Profile Barrel for Your Precision AR-15
The MK12 platform received fame for its use with US Special Operations groups as a semi-automatic precision rifle, and one of the essential elements of the platform is now offered as the Brownells 5.56 NATO MK12 Profile AR-15 barrel. The Brownells 5.56 NATO MK12 Profile AR-15 barrel are completely machined and finished by craftsmen in the USA and are made using stainless-steel bar stock that's 416-R certified steel and completely stress relieved. The barrels measure 18 inches long. Features 1:7 rate of twist Suppressor ready with 1/2x28 TPI threads Features 11-degree target crown Each barrel undergoes magnetic-particle inspection for quality The Brownells 5.56 NATO MK12 Profile AR-15 barrel also features a complete nitride treatment, as well as precision machining for perfect suppressor compatibility.

Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The Brownells 5.56 NATO MK12 Profile AR-15 barrel is an 18-inch stainless-steel precision barrel, stress-relieved and made in the USA.
  2. It features a 1:7 twist rate, is suppressor ready with 1/2x28 TPI threads, and has an 11-degree target crown.
  3. The barrel is designed for the MK12 platform, undergoes magnetic-particle inspection for quality assurance, and has a nitride finish for durability.

Attributes

  • Cartridge: 5.56 mm NATO
  • Contour: MK12
  • Finish: Black
  • Gas System Length: Rifle
  • Length: 18''
  • Muzzle Threads: 1/2-28
  • Twist: 1-7
  • Weapon type: AR-15
  • Delivery weight: 0.907kg
  • Shipping height: 51mm
  • Shipping width: 51mm
  • Shipping length: 483mm
  • UPC: 050806029514

Item details

Made in USA
US export classification: 0A501.c

Customers reviews

Customer ratings (2)

4.5 / 5
Recommended

Brownells USA Good if your on a budget 18/09/2018

This barrel has 2 things working against it.



#1 No dimple for gas block- Easy fix but can make lining the GB up a real PITA if you don't know how and are using the Badger MK12 gas block which is a super tight fit.



#2 The shoulder for the collar is too far back. I pulled the collar off of my PRI MK12 and it lands in the same place. It is fixable if you know how though.



The up side is it is a good price for a 5R barrel that shoots good. Accuracy is just under what my PRI factory built gun will do with 77gr Razor Core ammo.



Definitely recommended

Brownells USA I was hesitant, but now glad I got this! 06/04/2018

First off packaging, fit and finish on mine are excellent.

First trip to the range with this I ran some IMI razor core 77gr 5.56 to warm up before I started shooting load development for my CLE Douglas SPR.

The barrel shoots fast, as the average velocity over 25 rounds fired was 2830 over the magnetospeed, but it shot very well. After getting dialed in I shot three consecutive sub MOA groups, all in the .8 range, from the prone with a bipod and rear bag at 100 yards.

Does it shoot as well as my Douglas? Probably not but to be fair it shot this anmo better than my Douglas did and with less pressure signs. Handloads will tell the tale for sure but overall for the price I’m very happily surprised with this barrel.

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