Crafted for precision and durability the Ballistic Advantage Modern Series 18" 5.56 NATO SPR Barrel is an exceptional choice for firearm enthusiasts. Constructed from 4150 Chrome Moly Vanadium steel it ensures long-lasting performance with its QPQ corrosion-resistant finish. Designed for advanced shooting applications this barrel features a 1:7 twist rate ideal for stabilizing heavier projectiles. The rifle-length SPR profile and .750 dimension accommodate the OPS Inc 12th model collar and suppressor enhancing accuracy and control. Whether you're building a custom AR-15 or upgrading an existing setup this barrel offers unmatched reliability and precision.