The Ballistic Advantage AR-15 Rifle Length 18" Barrel SPR with OPS 12 is engineered for precision and performance. Weighing 41 ounces this barrel is crafted for the versatile .223 Wylde cartridge offering compatibility with both .223 Remington and 5.56 NATO rounds. Its SPR contour is designed for stability and accuracy complemented by a refined bead blasted finish for enhanced durability and aesthetics. Featuring a rifle-length gas system this 18-inch barrel ensures reliable cycling and smooth operation. The muzzle is threaded at 1/2-28 accommodating a variety of muzzle devices while the 1-8 twist rate optimizes bullet stabilization for consistent accuracy. Ideal for AR-15 configurations this barrel combines advanced engineering with exceptional craftsmanship for shooters seeking superior performance.