BSF Barrels AR-10 .308 Winchester Threaded AR Barrel 5/8x24 1-10 Rifle 18in .875 Strait Black/Stainless. We use this jacketing method rather than wrapping the barrel in carbon fiber because this method of wrapping has been proven to trap heat and cause delamination. The carbon fiber we use is specially designed to move at the same expansion rate as 416R stainless steel. We machine slots into the carbon fiber allowing air to move around the barrel and vent heat quicker without any delamination issues. Using the Carbon Fiber this way keeps the rifling straighter the warmer the barrel gets because it's under tension. This allows us to maintain superior stiffness and strength while keeping the barrel extremely lightweight. Specifications for BSF Barrels AR-10 .308 Winchester Threaded AR Barrel: Manufacturer: BSF Barrels Finish: Carbon Fiber Caliber: .308 Winchester Barrel Profile: Contour Barrel Twist Rate: 1-10 Barrel Material: 416R Stainless Steel Firearms Threads Per Inch: 5/8x24 Package Contents: BSF Barrels AR-10 .308 Caliber Threaded Barrel What firearm models does the manufacturer say BSF Barrels AR-10 .308 Winchester Threaded AR Barrel is compatible with? The manufacturer suggests that BSF Barrels AR-10 .308 Winchester Threaded AR Barrel is compatible with DPMS AR-10 AR-10BSF Barrels SF3IYT0089: AR-10 .308 Winchester Threaded AR Barrel 5/8x24 1-10 Rifle 18in .875 Strait Black/Stainless