Designed for those looking to save weight while still allowing for long term suppressor use, the BIG Gunner is ideal for suppressed shooters, all at just about one pound. The barrel features a Government profile behind the gas block, tapering to a shoulder with a 1.10 inches journal .625 gas block. In front of the gas block, the barrel continues straight to a 1/2-28 muzzle with a full shoulder. Faxon Firearms barrels represent the pinnacle of value. Manufactured in house, these barrels are fully stress relieved, air gauge tested and 11 deg target crowned to ensure superior accuracy. Quality is embedded in every stage of the process, starting with the best materials, like certified 4150 Mil Spec steel. Each barrel undergoes a battery of tests throughout the manufacturing process, finishing in Nitride and undergoing a final inspection. Additionally, every barrel is individually checked for headspace using precision custom hardened gauges to ensure long lasting performance and reliability. Mid-length gas system for smoother recoil and reliable cycling Finished with a QPQ nitride-coating Standard 1/2-28 muzzle thread for broad compatibility with suppressors and muzzle devices Compatible with a 5/8 inches diameter gas block Equipped with an M4 barrel extension Magnetic particle inspected for quality assurance Precision 11 degree target crown for improved accuracy and consistent bullet trajectory