I recently purchased a crosman 3357 and it's in good condition eccept i need to find someone with a few parts for it and/or the ability to fix it. The rubber piece that holds the barrel up is comming loose because its older than me, and it wont spin the chanber a whole turn, also the trigger is missing a spring and piece which alow the trigger to come back into place everything else seems ok it still shoots fine if anyone can help id really appreciate it. thnx