Is this normal for mags?

[afultz075]

Ok, I know this is probably really stupid (i'm always paranoid when I get a new gun), but I have a question about my new minimag. It seems when my tank starts to get low, the gun seems to hiss every few shots, i'm just wondering if this is a normal thing or if I need a new o-ring somewhere.

[Chronobreak]

how new is it? has it always done this lvlX and if your using nitro or co2 the valve reactivity wil go dwon when the tank is really low

[afultz075]

I got it used and it was only used a few times. It has the stock valve and bolt and I use Co2 on a remote. Maybe there isn't enough pressure to recharge the vavle on some of those final shots?