Colt 10.3″ NSWC Crane Spec Barrel Kit

SURPLUS NSWC Crane Colt M4 CQB barrel

10.3 inch, 5.56x45mm NATO, carbine length gas system, 1/2×28 threads, chrome bore and chamber.  Began life as a 14.5″ gov. cut to 10.3″ and gas port opened to .070, threads are left raw and will show Rocksett reside from muzzle device removal.  Barrels were test fired only. Includes Colt gas tube, MK12 gas block, and Daniel Defense RIS II barrel nut.