Proof Research PR15 .224 Valkyrie AR-15 Barrel - Rifle Length - 18"

The Proof Research PR15 in .224 Valkyrie with an 18-inch carbon-fiber-wrapped barrel gives long-range AR-15 shooters a genuinely flat-shooting cartridge option with meaningfully more reach than standard 5.56.

Features:

• 18" barrel chambered in .224 Valkyrie, 1/7 twist rate
• aerospace-grade carbon fiber wrapped over a precision stainless steel liner for the complete barrel assembly
• Rifle 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

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.

.224 Valkyrie was developed specifically to extend the AR-15's practical long-range capability well past what 5.56 can manage, and the 18-inch barrel lets the cartridge reach more of that extended-range potential.

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.