Enhance your shooting experience with the Guntec USA BAR-5.5-300BLK 5.5" 300 AAC BLACKOUT Barrel, crafted for both precision and durability. This high-performance barrel, made from 4150 Chromoly Steel, ensures resilience and accuracy across various shooting environments. 1:7 twist rate for optimal bullet stabilization 5/8 X 24 thread pitch for compatible muzzle devices M4 feed ramps and pistol-length gas system for reliable cycling Black nitride finish for corrosion resistance Lightweight contour design for easy handling Choose the Guntec USA BAR-5.5-300BLK Barrel and experience unmatched performance and tactical versatility.