The Proof Research PR15 is a 16-inch stainless steel AR-15 barrel in 6mm ARC with a 1:7.5 twist and PXT rifling. It has a standard profile with a .750-inch diameter, five grooves and a 5/8x24 threaded muzzle.
- Manufacturer Part # : 152249
- Model : PR15
- Type : AR-15 Barrel
- Caliber : 6mm ARC
- Barrel Length : 16"
- Material : Stainless Steel
- Profile : Standard
- Diameter : .750"
- Grooves : 5
- Thread Pattern : 5/8x24
- Rifling : PXT
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