Ballistic Advantage 20″ 6.5 Grendel Premium Stainless AR15 Barrel – Rifle – DMR Fluted Profile


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AT3™ Low Profile Steel AR 15 Gas Block + Gas Tube + Roll Pin Combo - .750 - Rifle


6.5 Grendel and 6mm ARC Bolt Carrier

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BA 20 Inch 6.5 Grendel DMR Fluted Rifle Barrel

Originally developed for Special Operations, the 6.5 Grendel uses an AR15 upper receiver to give users a bigger bullet with better long-distance ballistics. Being able to convert your AR15 easily to 6.5 Grendel is quick and convenient with a bolt and barrel conversion. Ballistic Advantage took this a step further and developed 6.5 Grendel barrels with unique profiles and twist rates ideal for the cartridge to truly excel.

Ballistic Advantage is committed to making the kind of barrels that delight the most demanding users. Users expect a barrel that delivers round after round consistently, accurately, and with minimal recoil. The barrel provides true and reliable performance no matter how hot the action or how gritty the conditions are.

Upgrade your AR15 by switching to the cutting edge 6.5 Grendel caliber and flawless engineering of the Ballistic Advantage 20 Inch 6.5 Grendel DMR Fluted Rifle Barrel.

6.5 Grendel

The 6.5 Grendel is a low-recoil, long-range cartridge explicitly designed for the AR-15 platform. Noted for impressive ballistics, it uses .264 caliber bullets to make accurate shots out to 1,000 yards.  The 6.5 Grendel uses a unique bolt and caliber-specific magazine to convert any standard AR15.

With a wide variety of available factory ammunition, the 6.5 Grendel is a top choice for hunting medium-game or extended-range target shooting.

DMR Fluted Barrel Profile

A mid-length gas system, 18″ barrel length, and Designated Marksman Rifle (DMR profile) make recoil smooth and stand up to high round counts. The DMR is to place accurate shots at greater distances than other team members’ rifles.

Ballistic Advantage’s DMR Profile is made with a thick profile up to the gas block and then tapered down beyond it. This gives some of the best qualities of a lightweight pencil barrel and heavy weight barrel and combines them for a duty-ready barrel. Fluting lightens up the barrel for improved ergonomics and allows for faster barrel cooling due to the channels acting as cooling “vents”.

Additionally, this barrel is precision machined from 416R Stainless Steel with a Bead Blasted Finish. Stainless steel is easy to clean and maintain and resistant to the elements.

The Ballistic Advantage

Ballistic Advantage excels at barrel production and pays attention to the small details that make them a step above the rest. Details include nickel boron-coated feed ramps, incredible quality control, and a sub Minute of Angle (MOA) accuracy guarantee with match-grade ammunition. Stainless Steel material makes this barrel easy to clean and resistant to the elements.

Ensuring the best in quality and accuracy, Premium Series Barrels are MPI-tested and top-of-the-line for new shooters and professionals alike.


  • Brand: Ballistic Advantage
  • Model: Ballistic Advantage 20″ 6.5 Grendel Premium Stainless AR15 Barrel – Rifle – DMR Fluted Profile
  • Manufacturer Part Number: BABL65G004PL
  • Length: 20″
  • Material: 416R Stainless Steel
  • Finish: Bead Blasted
  • Profile: DMR Fluted
  • Twist Rate: 1:8″
  • Gas System Length: Rifle
  • Gas Block Journal:  .750″
  • Threading: 5/8×24
  • Compatibility: DPMS Gen 1 Pattern Receivers
  • Weight: 33.3 oz


Caliber6.5 Grendel Type II
Barrel Length20 inches
Barrel Twist Rate1:8 inches
Barrel Material416 Stainless
Muzzle Threads5/8/2024
Barrel FinishBead Blasted
Gas Block Size.750″ Gas Block
Barrel ProfileDMR Fluted
Barrel Gas SystemMidlength
Gas Block Journal Length1.9 inches
Barrel ExtensionM4
Weight33.3 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.