16" 4140 Chrome Molly steel alloy, the barrel is 6 groove button rifling with a 1-9 right-hand twist, lightweight Profile Chambered in 5.56 Nato with CARBINE Length Gas System
Comes with F-marked FSB or one rail upper gas block, barrel nut, and round handguard cap. Does NOT include: front sight post, detent, spring or front sling and rivet.
