The Tiger Rock Inc. BR40-8 AR-40 barrel offers unparalleled performance for your firearm, ensuring outstanding accuracy and reliability. Crafted in the USA, this .40 S&W barrel features an 8-inch length and a 1:16 twist rate, providing optimal bullet stabilization for precision shooting. Constructed from durable 4150 gun quality steel for long-lasting performance. Heat-treated and stress-relieved for exceptional durability. Sleek black nitride finish enhances corrosion resistance. Compatible with AR 40 S&W pistols and features a 5/8x24" thread pitch. Perfect for use with various muzzle devices and suppressors. Transform your shooting experience with the Tiger Rock BR40-8 barrel, a true symbol of American craftsmanship.