COBALT BLUE TRAINING GUN: The Viet-Nam era XM177 with ROUND Polymer 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: This gun comes with a 20 Round metal mag.  30 round metal mags DID EXIST in country, but damn few of them made it to South East Asia, as it was a private purchase.  Of course, if you watch the movies, seems like everybody had them.