SIG BARREL & GAS ASSY, MCX, SPEAR LT, 11.5″, 5.56

Replace or upgrade your MCX SPEAR-LT upper with this factory-quality 11.5″ barrel and matched gas assembly. Built to SIG tolerances, the assembly includes an 11.5″ 5.56 NATO barrel and the correct gas block/tube (piston or direct-impingement style as factory-specified for SPEAR-LT) set to the OEM gas port dimensions for reliable, tuned cycling. Machined from heat-treated premium steel and finished to resist corrosion and wear, this drop-in assembly is ideal for service, repair, or building a factory-compatible upper. (Confirm local legal restrictions for short-barreled rifles and barrel/upper transfers.)