TRYBE Defense 10.5 in GOVT/SOCOM Profile AR-15 Pistol Barrel 9mm 1/2X28 Threads Nitride Black BARPIST1059MM. This 10.5" barrel chambered in 9mm Luger boasts a Govt/SOCOM profile and is milled from 4150 Chrome Moly Vanadium Steel. Featuring a 1 in 10"...