Well I guess it's do-able, you say you are going to use bondo to make the asthetics?

Probably. I'll use that to fill in the cracks between the gun part and plastic m4 parts.



Also as Clemsonguy1125 said, propane is also an option if you want to look into that.

You mean using a propane tank ...

Well, I REALLY appreciate your advice. I planned on basing my M203 around these shells here : http://www.airsoftgi.com/images/airsoft_MB_M381-Grenade.jpg . You fill them up with Green gas and load them into a launcher which presses a small button on the back.
Anyways, the reason I am straying from ...

you may want to upgrade to hpa or co2

That's not really compatible with a $50 budget.

I have a larger budget than that, but it would take longer to aquire, somewhere around $100, it was just a goal to keep it under $50.
I do like the idea of the car air compressor with a car battery kept in a ...

Hello, I plan on building an inline vortex BBMG, but I will start the project and upload the progress into the thread, and ask questions as I go along.
I plan on doing something like Gun Freak's M16 inline vortex BBMG ( http://www.spudfiles.com/forums/m16-inline-vortex-bbmg-t21147.html ), except ...

This forum is about sharing ideas, I doubt anyone would be likely to (or indeed be capable of) preventing others from building on their designs, unless of course it was for profit or accompanied by false claims of innovation.
I know, but its more of a personal thing, because if someone doesn't ...

Gun Freak, this is simply amazing.
I love the way it actually looks like an M16.
Would you mind if I borrowed a few ideas from this, as long as I credited you? I would probably use the trigger idea from the pistol grip, the rail system, and the tank idea.

Well, thanks for the advice.
I will probably try to do the 150 psi rig reduced down to 75 psi
Is it possible/safe to put compressed air into a large Co2 tank?

Hello, my name is Jason.
I have built two pneumatic cannons before, and airsoft regularly.
I have been airsofting for two+ years at fields and events, and want to build a BBMG to field.
Thats the problem. I need help designing something that is portable, can be carried by a smaller person (I'm 5'6 ...