Ballistic Advantage 6mm ARC 20 Inch Barrel – DMR Profile Premium Black Series


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Full 20 Inch Designated Marksman Barrel for 6mm ARC

The Ballistic Advantage Premium Black series starts with a solid foundation: 416 Stainless Steel to maximize accuracy, with black nitride finish to resist corrosion.  The 20 inch length of this barrel imparts incredible velocity to an already accurate, efficient round, ensuring that you’ll reach your target at long range.  The heavy DMR profile also gives you repeatable accuracy for tight, sub-MOA groups with match ammo.

This barrel also features a Nickel Boron coated barrel extension, ensuring reliable feeding from your magazine.  The extension mates up perfectly with any upper with M4 feed ramps.  Be sure to check out a compatible 6mm ARC/6.5 Grendel bolt carrier group, as well as a magazine to complete your build.

Sub-MOA Guarantee

Buying a Ballistic Advantage barrel means guaranteed accuracy. All Ballistic Advantage barrels are guaranteed to give Sub-Minute-of-Angle (MOA) accuracy with match grade ammunition.


  • Caliber: 6mm ARC
  • Length: 20″
  • Material: 416R Stainless Steel
  • Profile: DMR
  • Finish: QPQ Corrosion Resistant
  • Gas System Length: Rifle
  • Gas Block Journal: .750″
  • Twist Rate: 1:7 inches
  • Muzzle: 5/8×24 Threaded
  • Weight: 46.2 oz
  • Other Info: HP and MPI Tested


Caliber6mm ARC
Barrel Length20 inches
Barrel Twist Rate1:7 inches
Barrel Material416 Stainless
Muzzle Threads5/8/2024
Barrel FinishBlack Nitride
Gas Block Size.750″ Gas Block
Barrel ProfileDMR
Barrel Gas SystemRifle
Gas Block Journal Length1.9 inches
Barrel ExtensionM4
Weight46.2 ounces

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Ballistic Advantage Warranty!

If for any reason you have a warranty issue with one of our products, please describe your situation, include your name and order number or transaction ID. One of our technical specialists will then review your claim and contact you within 5-7 business days.

PLEASE NOTE: We cannot provide warranty work if your items have been altered by you or anyone other than Ballistic Advantage from their original state.

Please call 407-347-4584 if you have any questions regarding this policy.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 1 review
Alexander Koutny
6 arc BA barrel.

Great accuracy, which was expected from BA. Highly recommend running this barrel with rifle buffer system, could not get malfunction free cycling with any combination of different weight carbine buffers, but that could've just been the magazines I was using ( 6arc ASC & 6.5 grendel Alexander arms mags ) gun ran flawlessly with rifle length buffer system though, had non adjustable micro gas block as well. Only reason I gave 4 stars and not 5, is I think every barrel over $100 should have gas block dimple from factory, this barrel does not.