BSF Barrels AR-10 6.5mm Creedmoor Threaded AR Barrel 5/8x24 1-8 Rifle + 2 24in .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 6.5mm Creedmoor Threaded AR Barrel: Manufacturer: BSF Barrels Finish: Carbon Fiber Caliber: 6.5mm Creedmoor Barrel Profile: Contour Barrel Twist Rate: 1-8 Barrel Material: 416R Stainless Steel Flutes: Yes Features of BSF Barrels AR-10 6.5 Creedmoor Rifle Barrel w/1:8 Twist 6 Groove Button Rifling DPMS Platform 11deg Target Crown Chambered in 6.5mm Creedmoor Package Contents: BSF Barrels DPMS 6.5 Creedmoor Threaded Barrel What firearm models does the manufacturer say BSF Barrels AR-10 6.5mm Creedmoor Threaded AR Barrel is compatible with? The manufacturer suggests that BSF Barrels AR-10 6.5mm Creedmoor Threaded AR Barrel is compatible with AR-10 DPMS AR-10BSF Barrels SF3IYT0078: AR-10 6.5mm Creedmoor Threaded AR Barrel 5/8x24 1-8 Rifle + 2 24in .875 Strait Black/Stainless