The Tiger Rock Inc. BR168-NT 5.56 NATO barrel delivers exceptional accuracy and durability, tailored for serious AR-15 enthusiasts. Constructed from high-grade 4150 heat-treated chrome moly steel, this 16-inch barrel strikes the perfect balance between maneuverability and precision. Its black nitride finish not only enhances aesthetic appeal but also provides superior corrosion resistance. 1:8 twist rate for versatility with various bullet weights Non-threaded design for a clean, streamlined appearance .750" gas block diameter for optimal gas flow Heavy profile for improved rigidity and accuracy Manufactured in the USA with quality craftsmanship Elevate your AR-15 performance with the reliable and high-quality Tiger Rock BR168-NT barrel.