Free shipping on orders $199 & over!

Free shipping on orders $199 & over!

Proof Research 6 ARC AR Type Steel Barrel – Multiple Size Options


Proof Research barrels are made to order. If the barrel is not in stock allow at least 12 weeks for shipping. 

Available Options:

Proof Research 6 ARC AR Type Steel Barrel

Proof Research 6 ARC AR Type Steel Barrel have set the standard for what a 6 ARC Barrel should be. The steel barrels are made in house with the exact same commitment to quality and repeatability as they employ on carbon fiber barrels. The drilling, rifling, and lapping process is identical to their composite barrels.  They start with the same steel used in the carbon fiber barrels.  It is a double stress-relieved 416R stainless steel, a pre-hardened chromium stainless steel that was specifically designed by engineers in collaboration with rifle barrel makers to provide the consistent, high quality and durability the firearms industry demands.

Proof Research 6 ARC AR Type Steel Barrel Features

Excellent machinability for gun drilling and reaming, plus exceptional polishability for uniform lapping

A homogeneous microstructure which responds to heat treatment providing a uniform hardness along the length of the barrel

An optimum combination of high tensile strength along with requisite toughness to withstand extreme chamber pressures encountered during firing

Excellent erosion wear characteristics and corrosion resistance

Product Registration »


Type Part Number Barrel Length Twist Rate Gas System Length Gas Journal Diameter Muzzle Thread Weight
PR15 130377 14.5” 7.5 Intermediate .750 5/8-24 1lbs 5oz
PR15 128664 16” 7.5 Rifle .750 5/8-24 2lbs 12oz
PR15 128688 18” 7.5 Rifle +1 .750 5/8-24 2lbs 14oz
PR15 130384 20” 7.5 Rifle +1 .750 5/8-24 3lbs 3oz


Be the first to review “Proof Research 6 ARC AR Type Steel Barrel – Multiple Size Options”

Your email address will not be published. Required fields are marked *