Bsf Barrels Caliberiber Button Rifled Barrel Features The Bsf Barrels Caliberiber Button Rifled Barrel begins with a turned-down 416R stainless steel match barrel wrapped in a roll-wrapped carbon fiber sleeve loaded under tension. This jacketing approach keeps the carbon fiber from trapping heat the way a simple exterior wrap would since the material is designed to move at the same expansion rate as the stainless steel beneath it. The barrel ships as Not Ported keeping the exterior sleeve solid and uninterrupted along its length. Button rifled construction with 6 grooves and a 1 in 7.5 inch twist is built to stabilize .257 and 25 caliber projectiles with consistent accuracy. Carbon fiber jacketing keeps this barrel extremely lightweight while preserving the stiffness and strength of a solid stainless steel barrel a real benefit for anyone carrying a precision bolt rifle into the field. At 43 oz it adds minimal weight compared to a traditional steel barrel of the same length. The 5/8x24 thread pattern accepts a range of muzzle devices for shooters who want to add a brake or suppressor down the line. Built for bolt action precision rifles the Bsf Barrels Caliberiber Button Rifled Barrel is for sale at GrabAGun for long-range shooters who want reduced weight without giving up accuracy. BSF Barrels Caliberiber Button Rifled Barrel Specifications Manufacturer: BSF Barrels Model: Caliberiber Button Rifled Barrel Caliber: .25 Caliber / 25 Caliber Barrel Length: 24 Barrel Finish: Carbon Fiber Barrel Material: Stainless Steel Barrel Description: Button Rifled Barrel Type: Not Ported Twist Rate: 1:7.5 Grooves: 6 Thread Pattern: 5/8x24 Weight: 43 oz Available At: GrabAGun