M-4 style 16" 4150 (machine gun steel) QPQ barrel.
5.56mm NATO 16" replacement barrel, 1:7 twist, 41V50 Mil spec vanadium alloy
steel, fully machined and assembled with M4 extension, QPQ bore and chamber for
optimum performance and durability, .750" gas block, A2 Front Sight Base, designed for carbine length
gas system, drilled gas port, QPQ finish, muzzle thread 1/2 x 28.