Quote Originally Posted by AC99 View Post
The .177 Club has a 2.4" piston stroke and the .22 Airsporter's stroke is 2.8" so piston unit/latch-rod dimensions may also differ between the two models.
I thought there was a stroke difference, but hopefully the head and seal profile will be the same --- I may have a look to see if I have a MK2 piston spare for dimensions as they interchange with the MK1.




All the best Mick