its not a leaky chamber after i pump it the gauge on the pump says on 0. after i open the ball valve air comes out, if i put the pump on the very end of the schacher valve it reads it for a bit then the pump thing pops of at 40 because its on the very end of the valve , i might just need to put a ga...

hm ive tryed the flicking thing just then but it hasn't made a difference and like i said ive tryed it on like 3 different pumps so its not that there faulty or cheap. thanks for ur comment tho

hey ive just finished building my pneumatic gun and when i attach the pump to it and start pumping the pressure gauge doesn't read how much psi is in there, ive tryed it on 3 pumps all with the same results and its not leaking plz help me

ok thanks allot now i can finally finish mine also very nice gun looks great.

how did u attach the ball valve to the bottle? im making something similar to this but my 20 mm ball valve doesn't fit on the bottle