Okay, here it is -

To start, the "green gas" sold in Japan is actually CO2. It's pretty strange to think of CO2 as an "environmentally friendly" product, but that was the selling point. I guess it's better than using freon, so it must be good. Anyway, I like the Testors brand of airbrush propellant. Mainly because K-Mart sells the stuff for $7 for a 15oz can and one can lasts me a few months. Also, I've noticed that the Badger stuff sometimes causes rust on some metals in the valving. That's really bad since you don't see it until you take the valving apart.

Since I started playing back when the freon-based propellant was still used, I just call the can a flon (freon with silicon oil) can. Filling the flon cans is easy. Just put the can you want to fill in the freezer for an hour to get it nice and cold. Once it's cold, put it on a table or something and then place the airbrush propellant can on top of it at a slightly off-center angle. The nice thing about the airbrush cans is that the tops are made to work with a pin type depressor, which means the thing with only flow when there is something inserted into the can. The flon cans have a fill nib/nipple (whatever) that fits perfectly into the airbrush can. With the airbrush can upside-down and the flon can nice and cold, the liquid propellant flows into the flon can VERY nicely. Just be sure not to fill the flon can TOO much. If you do, it may overpressurize when it gets back to room temperature. While I doubt the can will burst, when you fill the tank on a gun, it may overpressurize the gun's valving, making it inoperable until the excess pressure is bled off.

One last note. If you do refill your own cans, be sure to NEVER mix brands of propellant. I did that once and had this really disgusting green liquid shoot out of my gun. Of course, some people may think that's a cool thing.

Blake

WARNING: Neither X-ring nor anyone else assumes any responsibility for anything you do with airsoft models. Anything you do with airsoft is at your own risk!