Bsf Barrels Pre-Fit Features The Bsf Barrels Pre-Fit begins as a turned-down 416R stainless steel match barrel before being jacketed in a roll-wrapped carbon fiber sleeve loaded under tension. This approach was chosen specifically over wrapping the barrel directly in carbon fiber which has been shown to trap heat and cause delamination over time and repeated use. The carbon fiber used in the jacketing is engineered to expand at the same rate as the stainless steel beneath it keeping the two materials working together as the barrel heats during a string of fire. A 1:10 twist rate is matched to standard .308 Win bullet weights giving the barrel broad compatibility across common factory and handloaded ammunition. The 22 button rifled barrel is built as a non-ported design with a 5/8x24 thread pattern giving the shooter the option to add a muzzle brake or suppressor down the road. Because the carbon fiber sleeve is under tension the barrel s rifling stays straighter as it heats up an advantage during extended range sessions or competition strings. At 41.10 oz the Pre-Fit is considerably lighter than a comparable all-steel .308 Win barrel helping offset the overall weight of a precision rifle build. The Bsf Barrels Pre-Fit is available for sale at GrabAGun for .308 Win shooters looking for a lightweight durable carbon fiber barrel upgrade. BSF Barrels Pre-Fit Specifications Manufacturer: BSF Barrels Model: Pre-Fit Caliber: .308 Win Action: Bolt Barrel Finish: Carbon Fiber Barrel Material: Stainless Steel Barrel Type: Not Ported Twist: 1:10 Grooves: 6 Thread Pattern: 5/8x24 Barrel Description: Button Rifled Barrel Length: 22 Weight: 41.10 oz Available At: GrabAGun