Faxon Firearms barrels represent the pinnacle of value and precision. Manufactured in house in Cincinnati, Ohio, each barrel undergoes a rigorous process to ensure superior accuracy. Fully stress relieved, air gauge tested and 11 deg target crowned, these barrels are built for exceptional performance. We begin with the highest quality materials, including certified 4150 Mil-Spec steel and subject each barrel to a battery of tests throughout every stage of production. After being finished in nitride for enhanced durability, every barrel is final inspected to meet our strict standards. To ensure the perfect fit and reliable function, all barrels are individually checked for headspace using precision PTG gauges, guaranteeing the best possible performance for every shot. Equipped with a carbine-length gas system for dependable performance and balanced recoil management Magnesium phosphate exterior finish 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