Quote:
Originally Posted by Saberwing
If you have an air compressor, could you theoretically fill up GBBR mags with HPA? or would the pressure be to great
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GBB mags are meant to handle 160psi... 180psi TOPS. That's for propane.
HPA tanks hold about.... 4,500psi. Hope you're wearing body armor when you try to fill that bad boy up. LOL
Secondly, because HPA doesn't go through a phase change like propane does (liquid to gas), and is only in gas form, you'll get maybe... 3 shots off before you're out of gas. That's assuming the magazine didn't blow up, or the bolt exploded out of the back of the buffer tube and embedded itself in your shoulder. The pressure would drop exponentially on each shot. For example, first shot would expel at 4,500 psi. Second shot, would have maybe 500psi left. And the final shot might have 10psi. If even that. More likely, all pressure would be expelled by 1 or 2 shots. It's the exact same as if you filled your GBB mag upside down so that only gas is going in to the mag.
The only reason why HPA external air rigs work, is because a regulator valve is put in line to control how much pressure goes to the magazine. You'll have a hard time finding the space to put a regulator between the magazine and the gun.
There was once a guy who decided to fill up a WE propane mag with a Madbull CO2 adapter. Full pressure 12g CO2 canisters are up to 850psi. Needless to say, the magazine exploded in his hands. Full shards of metal flying everywhere. He was lucky he was wearing gloves and had face protection on.