Originally Posted by ellis d
To cure the problem, sell your hw77, buy a full length tx200mk3 then ditch the internals on your tx buy a mk2 spring and a short stroke alloy piston with standard air arms piston seal and properly fitting spring guide and top hat, That's what I had to do for the problem to go away
+1 from me too
My TX has been in and out of it's stock loads of times and it hasn't moved a single click.
One of the reasons I prefer the TX to the HW's is that I can strip the internals on the TX without removing the scope, I always had to remove the scope to do a strip down on my 97.