I think that i need to re-seal mine. i think its shooting kinda weak. my 10-11 yr old nephews use it and i think that they over-pump it. wonder how hard that would be to do, or if its even worth it lol you can get them so darn cheap. I need to verify it with a chrony first. i was just shooting mine today, they are really fun and accurate as heck at 20 yds and under. i was shooting a soda can at 25 today and couldn't miss, the cheap pumpers are a total blast.