ksc usp gas problem ? :/

[Tomm]

brought this at christmas and somethings wrong with it i dont know much about gas guns so if i do get a response to this keep it simple :P the mags dont leak they are all fine just seems when i start firing it uses too much gas when you sqeeze the trigger and it fires it like has a puff of gas out off the slide didnt do it before but its started to and now only fires a few bbs then theres no gas left sorry for nooby way i have put this but i havent opened the gun up yet cus i dont know what im looking at
Tom

[Q]

Re: ksc usp gas problem ? :/

Sounds like the seal at the top of the mag, where the gas is vented into the slide is not sealed properly. Check that it is fully seated into the mag, failing that some silicone lube/spray should seal it up and stop the problem

[Tomm]

Re: ksc usp gas problem ? :/

cheers for that so the rubber at the top of the mag spray some silicon on there?