BSF Barrels Blank .308/30 Cal Bolt Action Threaded AR Barrel, 5/8x24, 1-8, 20in, .930 Strait, Black/Stainless, SF3IYT0254

they 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 they use is specially designed to move at the same expansion rate as 416R stainless steel.