Will leaving airgun pumped up to an hour harm it and will cold weather harm it??

I just ordered a Crossman recruit for small game hunting at close range (squirls and rabbits) With hunting pellets. Its pretty much a little more powerful than a pump master 760 everything else is almost the same. For hunting I will need to pump it ahead of time because if I see a squirl I cant just pump it 10 times(I will need to pump 10 times for hunting). So will leaving it pumped for at most maybe an hour or two harm it????? Also if I ever use it in the winter will cold weather harm it??? Also how long do these things last if you don't abuse them?? Also I will be Leaving it pumped for a little while every time, So will it wear over time???
 
It will be just fine. It may lose some pressure posibly. You may have to add a pump or two if its been a while. The pcp guns are left charged indefinitely. Should last a very long time like anything else if you take care of it. I'm sure it can be rebuilt if necessary. May need seals someday. Check the manual for lubrication info. Good luck.
 
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