Proof Research AR10 Carbon Fiber Barrel | 308 WIN

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(1 review)
4.00 (in)
36.00 (in)
4.00 (in)
Current Stock:
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We have designed our AR barrels with the goal of improving performance and reliability in the AR platform. Our Caliber Matched Gas System (CAMGAS) results in a gas system that is tuned specifically for the cartridge and length of the barrel. The AR-15 Platform was originally designed around the 223REM and 5.56NATO cartridges and the AR-10 was designed around the 308 Win/7.62NATO round. With higher performance cartridges such as the 22 Nosler and 6.5 Creedmoor, the bore pressure remains higher further down the barrel. By moving the port location, we ensure that the gas system pressure is the same as what the AR platforms were originally designed around. The result is a recoil impulse that is noticeably softer, less fouling in the receiver, increased reliability of extraction, and less wear and tear on brass. This helps keep you on target and shooting while taking advantage of the latest high performance cartridges.

Length Twist Gas Length Gas Journal Muzzle
16" 1:10 Intermediate (Included) .750 5/8-24
18" 1:10 Rifle .875 5/8-24
20" 1:10 Rifle .875 5/8-24


* Barrels are guaranteed for headspacing to the specifications of the JP Enterprise Enhanced Bolt.

* It is recommended to double check and ensure proper headspace before firing your rifle.

* We recommend the use of full mass components throughout (full mass bolt, buffer, and springs).

* All barrels with Intermediate, Rifle +1, Rifle +2, and Rifle +3 gas systems include the proper gas tube.

* Our AR-10 barrels use a deep feed system that makes the feed ramps compatible with the feed ramps in the lower receivers of both DPMS and Armalite style rifles.

* 6 ARC Disclaimer - It is our recommendation to refrain from shooting bullets that weigh less than 100 grains.

Barrel Contour:
Heavy / .875
Barrel Length:
Barrel Twist:
308 Winchester
PROOF Research
Carbon Fiber
Gas Length:


  • 5
    Great barrels from a trusted company (Proof Research and Evolved Ballistics)

    Posted by Derik Sherlund on Oct 12th 2021

    I ordered two barrels, both .308, one for a customer and one for myself. Paul gave no hassle and has always been upfront regarding shortages and time-frames. The barrel shoots like a dream out of my build and everything was completed timely with no miscommunications or over-promised/under-delivered services. Evolved Ballistics and Proof Research will always be my go to for top-tier parts and service.