Proof Research carbon-fiber 6.5 Creedmoor barrel for AR308 platforms. It features a 20-inch overall length, 5/8x24 muzzle threads, 1:8 twist cut rifling, .875 inner gas block diameter, rifle-length +2 gas system length and extended feed ramps.
Proof Research carbon-fiber 6.5 Creedmoor barrel for AR308 platforms. It features a 20-inch overall length, 5/8x24 muzzle threads, 1:8 twist cut rifling, .875 inner gas block diameter, rifle-length +2 gas system length and extended feed ramps.