I've just bought an S400, with AA scilencer, and a Walther 3 *9 *56 IR scope. The problem I have is that I have a stirrup pump and the adapter for the gun, however I am missing a washer. a friend of mine showed me his pump and he had a washer which I transferred onto mine and it held pressure.

it's basically a metal washer with a rubber inner. I phoned uttings and they didn't know what I was talking about, hopfully someone here does. Do you know where I can get one of these, I've never seen them before but it's obviously what I'm missing. I'm sure they cost pennies.

cheers, Martyn