Originally Posted by Wheelieneilie
I did exactly the same and changed my S400 .22 from Classic to carbine last month. I got the barrel and cylinder etc from Julian at Bond Gun accessories. He is excellent for AA parts. Just leave a telephone message and he will ring you back.
I will get the air reservoir and some seals from Julian at Bond, but at the moment I am trying to use the old barrel.
My neighbour has a small workshop and has cut 100mm off the old barrel, just need to get a good crown on it now....