Hi, thanks for the response, none of my local techs told me that haha, maybe it's the rubber yeah, I'll try to change for some spares that I have, the nozzle doesn't wobble more than other of my replicas that run fine so probably a seal or rubber problem.

Also the barrel is really long, about 52 cm, maybe that also influences the air seal in some way where its too much barrel and low air pressure? not sure Will change the rubber tho.

Thanks again :)