Manufactured in house, these barrels are fully stress relieved, air gauge tested and 11 deg target crowned to ensure superior accuracy. Quality is embedded into our barrels from the very beginning. We use only the best materials, such as certified 4150 Mil-Spec steel. Each barrel goes through a series of tests at each stage of the manufacturing process, finishing with Nitride treatment and a final inspection. Additionally, all barrels are individually checked for headspace using precision custom hardened gauges to guarantee lasting performance and reliability. Equipped with a carbine-length gas system for dependable performance and balanced recoil management Finished with a QPQ nitride-coating Standard 1/2-28 muzzle thread for broad compatibility with suppressors and muzzle devices Equipped with a 3/4 inches diameter gas block Designed with a 1.9 inches L gas block journal Equipped with an M4 barrel extension Magnetic particle inspected for quality assurance Precision 11 degree target crown for improved accuracy and consistent bullet trajectory