Proof Research PR15 .300 Blackout AR-15 Barrel - Pistol Length - 12.5"- Carbon Fiber

The Proof Research PR15 in .300 Blackout with a 12.5-inch carbon-fiber-wrapped barrel and pistol-length gas system gives SBR and AR pistol builders a genuinely lightweight option tuned specifically for .300 Blackout's shorter-barrel ballistics.

Features:

• 12.5" barrel chambered in .300 Blackout, 1/7 twist rate
• aerospace-grade carbon fiber wrapped over a precision stainless steel liner for the complete barrel assembly
• Pistol Length gas system length, dimpled for a set-screw gas block for simple alignment
• Standard 0.750" gas block journal diameter for compatibility with most aftermarket gas blocks
• Cut rifled for genuine accuracy and a long service life
• Threaded muzzle for mounting a suppressor or muzzle device
• 5/8x24 threaded muzzle for .30-caliber suppressors and muzzle devices

Wrapping the barrel in carbon fiber over a thin steel liner trims real weight from the front of the rifle compared to an all-steel barrel of the same length and contour, while the carbon fiber jacket also helps dissipate heat during strings of fire.

.300 Blackout was purpose-built to run reliably out of genuinely short barrels while remaining compatible with both supersonic and subsonic loads, making this 12.5-inch configuration a popular choice for suppressed SBR builds.

Proof Research has manufactured carbon-fiber-wrapped barrels since 2010, and its PR15 and PR10 lines reflect that same barrel-making expertise applied to the AR-15 and AR-10 platforms specifically for builders and gunsmiths.