Proof Research 6mm ARC AR-Type AR-15 Barrel - Rifle Length - Stainless Steel - .750" - 18"

Manufactured by Proof Research
SKU: 128688
MPN: 128688
Manufactured by Proof Research
(0) No Reviews yet
No Longer Available
For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



This 6mm ARC AR-15 barrel is an offering from Proof Research and is a product from their AR-Type line of Traditional Steel gun parts.  It is a stainless steel, corrosion resistant and high strength 18-inch-long barrel that’s well suited to handle the high pressure of the 6mm ARC round.  The barrel features a rifle-length gas system that has proven to be the best length system for long-range shooting applications, allowing for the dwell to be minimized as well as providing a softer feeling recoil.  In addition, the Proof Research AR-Type Stainless Steel Barrel comes with a .750” gas block journal and will accept your choice of many aftermarket gas blocks. 

  • 18”
  • 6mm ARC
  • Rifle Length Gas System
  • Stainless Steel
  • .750 Gas Block Journal

Proof Research is a premium manufacturer offering some of the most reliable and innovative barrels designed for avid shooters. By combing PR's unique manufacturing process with their advanced technology, they have managed to produce rifle barrels that are durable, lightweight, heat resistance and over provide superior performance.
See More


Barrel CoatingStainless Steel
Barrel ContourDMR
Barrel Length18
Barrel LiningStainless Steel
Barrel MaterialStainless Steel
BrandProof Research
Caliber Gauge6mm ARC
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthRifle
Thread Pattern5/8 X 24
Twist Rate1:7 5R
Weight2.14 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

No reviews available

Be the first to Write a Review