COBALT BLUE TRAINING GUN: The Viet-Nam era M-16A1 with triangular Handguard.  Full Size, Full Weight, X-Ray Correct.  Full Functionality: Everything works, just like a live fire gun. Ammo loads into the mag,  (5 rounds included) 20 round METAL Mag loads into the gun, Bolt cycles (DOES NOT LOAD OR EJECT DUMMY AMMO, as per ATF Regulations) Rear sight Adjusts, Front Sight Adjusts, Strips like Original, Forward assist works, Buttstock has trap.  All of our Cobalt Blue Series are full metal, with the only polymer being the Buttstock, and the Handguard.   We have a great deal of latitude with these guns, and offer them in a variety of finishes.  No Disapointments here.  These are offered with either a Birdcage, or a Duckbill. NOTE: The Birdcage is more correct for the M16A1, but the 3 Prong Early style looks awesome, and screams NAM!