I bought me a stoeger xm1 s4 and every time I try to air it up it starts leaking all the air out of the barrel I replaced the o rings on the transfer port and it's still leaking someone please help me sos
Omg I'm so dumb thank you so kuchcock the gun before you fill.
hammer spring can sometimes push on valve enough to prevent it from sealing when empty.
cocking the gun takes the pressure off so it can seal.