The Ballistic Advantage AR-15 Rifle Length 18" Barrel SPR is a precision-engineered component designed for optimal performance and accuracy. Weighing in at 32.02 oz this barrel is chambered in 223 Wylde offering versatility for both 5.56 NATO and .223 Remington cartridges. Its SPR contour and bead-blasted finish provide a sleek and durable exterior. Featuring a rifle-length gas system it ensures reliable cycling and reduced recoil. The barrel is 18 inches long and includes 1/2-28 muzzle threads for compatibility with a variety of muzzle devices. With a twist rate of 1-8 it is ideal for stabilizing a wide range of bullet weights making it a perfect choice for any AR-15 setup.