I've pondered this idea for a while now. I thought it would be neat to make a very simple, small and touch mechanism that would fit into a copy of a mechbox shell. It would operate similar to a real gun if my fantasy of hooking it up with the cocking lever/handle and using the ejection port to help blast of exhaust and heat would some how come true. I was thinking, a small removable gas canister in the size of your average large, mini and stick batteries that would be stored in the same place and hook up to the mechbox in the same way as electric internals do. Now of course, alot of people have already taken the "best" route and have bought plastic TM guns. I'm sure we wouldn't be seeing to many a' TM guns sold if this were completed.
Hmm, maybe my mind gets little too creative.