The Proof Research PR10 AR-10 barrel is chambered in 308 Winchester with an 18" stainless steel barrel, 1:10 twist and a rifle-length gas system with a .750" gas block diameter. It is threaded 5/8x24.
- Manufacturer Part # : 100677
- Type : Barrel
- Fits : AR-10
- Caliber : 308 Winchester
- Barrel Length : 18"
- Material : Stainless Steel
- Gas System : Rifle Length
- Gas Block Diameter : .750"
- Muzzle Thread : 5/8x24
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