Quote:
Originally Posted by tunabreath
It doesn't really, not significantly anyways. I've left mags fully or partially loaded with BBs for months on end with no consequence. If the mag springs are actually compressed to the point of permanently yeilding with the amount of BBs you can put in there, well, that's a pretty poorly designed mag.
If anything, I'd still recommend unloading your mags just from a safety perspective. I think it's pretty much accepted that the act of loading and unloading your mags deteriorates the springs more than just storing them loaded.
As for gas, definitely keep at least a little gas in them to keep the seals properly formed. Every time I've left a mag without gas, it has ended up leaking. There shouldn't be any issue with leaving your mags fully gassed either, provided they're not going to be overheated or something. Because the gas in the mag is typically a liquid/vapour, the pressure in the mag is pretty similar no matter how full it is, at any given temperature. (somewhere around the vapour pressure for the gas)
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I completely Disagree(about AEG mags), At least with something like an MP5 mag where some of the mid caps have pretty steep curves in them and leaving them loaded can cause binding issues in my experience. In a lot of mags I've worked on it seems like they're isn't much of an issue if they are more than half empty. This is mostly with Mid Caps as opposed to Real Caps