Proof Research PR15 .300 Blackout AR-15 Barrel - Pistol Length - 12.5" - Stainless Steel

The Proof Research PR15 in .300 Blackout with a 12.5-inch stainless steel barrel and pistol-length gas system gives SBR and AR pistol builders a genuine all-steel option tuned specifically for .300 Blackout's shorter-barrel ballistics.

Features:

• 12.5" barrel chambered in .300 Blackout, 1/7 twist rate
• cut-rifled 416R stainless steel 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

The 416R stainless steel construction gives this barrel excellent accuracy potential and corrosion resistance, a genuine choice for builders who prefer an all-steel barrel over a carbon-fiber-wrapped design.

.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.