Colt M203 Grenade Launcher.  This is a re-weld and was only cut once.  It was not held properly while welding and will not close all the way. It is only off a little but I don't have time to fool with it.  You can straighten it if you have a press or cut and re-weld it complete with original handguard and flip-up sight.  Bargain at $1,500.