The Proof Research PR15 steel barrel (brand part no. 128664) is a 16-inch, AR-style barrel chambered in 6mm ARC, offered as a steel alternative within Proof Research’s PR15 barrel line.

Key Specifications

• Chambered in 6mm ARC.
• Barrel length of 16 inches, meeting the federal rifle minimum.
• 1-in-7.5 twist rate.
• Steel construction, part of Proof Research’s PR15 barrel line.
• AR-style pattern, fitting AR-15/AR-10 platform builds.

Frequently Asked Questions

Does this barrel need any special registration? No, at 16 inches it meets the federal rifle barrel-length minimum, so no NFA paperwork applies to the barrel length.

Is this a carbon-fiber barrel? No, this is the steel version in Proof Research’s PR15 line, distinct from their carbon-fiber-wrapped barrels.

What twist rate does it use? 1-in-7.5, matched to 6mm ARC bullet weights.

Buy the Proof Research PR15 Steel Barrel

Order this barrel from our Proof Research lineup, browsable in our full shotgun parts selection, with fast, insured shipping from our Lubbock, Texas gun shop.