BSF Barrels AR Barrel Features The Bsf Barrels carbon fiber barrel starts as a turned down 416R stainless steel match barrel which is then jacketed in a roll wrapped carbon fiber sleeve and loaded under tension rather than simply wrapped. This jacketing method avoids the heat trapping and delamination issues that can occur when carbon fiber is wrapped directly around a barrel a problem Bsf engineered around specifically. The carbon fiber material is formulated to move at the same expansion rate as the 416R stainless steel underneath so the two materials expand and contract together as the barrel heats during sustained firing. Slots machined into the carbon fiber allow air to circulate around the barrel venting heat more quickly without introducing delamination risk. Because the carbon fiber jacket is under tension it actually helps keep the rifling straighter the warmer the barrel gets a meaningful advantage for shooters running strings of fire during a competition or extended range session. The 20 inch button rifled barrel is cut with a 1 in 7 inch twist rate suited to stabilizing a range of 22 ARC bullet weights and the 5/8x24 thread pattern accepts a muzzle brake compensator or suppressor. Built specifically for the AR-15 platform the barrel drops into a compatible upper for shooters upgrading an existing rifle or building a new precision gun. Shooters chasing superior stiffness and strength in a lightweight package will find this Bsf Barrels 22 ARC barrel available for sale at GrabAGun. BSF Barrels AR Barrel Specifications Manufacturer: BSF Barrels Compatible Hosts: AR-15 Caliber: .22 ARC Barrel Length: 20 Barrel Finish: Carbon Fiber Barrel Material: Stainless Steel Twist Rate: 1:7 Diameter: .875 Grooves: 6 Thread Pattern: 5/8x24 Barrel Description: Button Rifled Available At: GrabAGun