It's not the battery that came with it is it? Apparently that one is CRAP and you should just chuck it away as soon as possible.
Some people have reported using the Kraken stock for thousands of rounds and some report it breaking within 3 days. The QC is really hit and miss. So a little bit of preventative maintenance is probably a good route and doesn't really hurt too much at all to ensure that it's all good and won't break on you in 3 days.
Also check out "Border Wars" (coming this summer) if you're into the milsim kind of thing.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE