how can i know...
 

how can i know which magazine will fit in my crosman P9 ?

i cant find another magazine for this gun [help]

... crosman p9?? thats like 20 bucks.. lol just buy another one and use the mag from that..

1) If it's crap, chances are we don't know anything about it.
2) Don't buy crap. It's not worth it.
3) GOTO 1).

Crosman P9? Is that the little clear AEP from CT? I doubt you'll find the mags available for individual sale.

You may wish to consult the crossman companie website to see if any replacement magazines are available for sale, failing that attempt to make contact with someone from the company to see if individual mags are produced for resale. Short of that there is nothing else I can suggest.