Blackviper USP Gas Leak?

[Nickona]

Hi,

I've recently got a blackviper usp NBB pistol second hand. It fires fine but the gas doesn't appear to be staying in the magazine as if i leave it for a minute or two there will be no gas in the gun.

Can anyone help?

Thanks nick

 

[Cerbo Knight]

Hi,
I've recently got a blackviper usp NBB pistol second hand. It fires fine but the gas doesn't appear to be staying in the magazine as if i leave it for a minute or two there will be no gas in the gun.

Can anyone help?

Thanks nick

Try lubing the all the valves on the gun, but it does help if we know where it's leaking from

 

[Nickona]

I think it may be coming from the magazine