BSF Barrels Barrel Features The Bsf Barrels carbon fiber barrel is built from a turned down 416R stainless steel match barrel then jacketed in a roll wrapped carbon fiber sleeve loaded under tension rather than simply wrapped around the steel. This process avoids the heat trapping and delamination that can occur with a conventional carbon fiber wrap since the carbon fiber is formulated to expand at the same rate as the stainless steel beneath it. If the ported option is chosen slots machined into the carbon fiber allow air to circulate and vent heat quickly without delamination risk. Because the jacket is under tension it keeps the rifling straighter as the barrel warms during sustained firing an advantage for shooters stretching their rifle s legs at distance. Cut to a 20 inch length with a 1 in 10 inch twist rate this .308 Win barrel is sized to stabilize common bullet weights used in hunting and precision rifle applications. The 5/8x24 thread pattern accepts a muzzle brake compensator or suppressor for recoil management or sound reduction. At 39.70 ounces the barrel balances the stiffness and strength of a traditional steel barrel with the reduced weight carbon fiber jacketing provides. Precision rifle builders looking to upgrade a bolt action .308 Win rifle with a lightweight heat stable barrel will find this Bsf Barrels option available for sale at GrabAGun. BSF Barrels Barrel Specifications Manufacturer: BSF Barrels Caliber: .308 Win Barrel Length: 20 Action: Bolt Barrel Finish: Carbon Fiber Barrel Material: Stainless Steel Barrel Type: Not Ported Twist Rate: 1:10 Grooves: 6 Thread Pattern: 5/8x24 Barrel Description: Button Rifled Weight: 39.70 oz Available At: GrabAGun