Quote Originally Posted by Aimstraight View Post
Doesn't sound like the valve seals have locked up from lack of use. You did not mention how you fill it. Does is have the snap on connector or the latest T bar connector? As mentioned above, the base of the cylinder can be filler using the MPR connector, that's what I use on my Mk 2 Target (which has a pressure gauge on one end, and the MPR connector on the other).
It's the old snap on connector. I've never heard of filling the cylinder from the base end. This could be a short term solution as I need the rifle for a week's time!