Looking for some advice please with an old Slavia 622 air rifle; as you'll know this is an ancient thing but has a few things going for it in my eyes. The main thing I want to do is introduce my grandson to the sport and the size of this is perfect so he can handle the gun without size induced awkwardness whilst learning safety etc. The problem is the shaft through the piston rotates in use so that the notch on the shaft, after a dozen or so shots, no longer engages with the primitive sear making cocking impossible. I say "primitive" as it can be stripped down to very basic components although this takes some time. I can't see any mechanism to stop the shaft rotating in the piston although surely there must be something I am missing, does it require something to act in that slot perhaps?. Spare parts in the UK are not available and indeed the seal seems to be riveted on anyway; any advice on how to stabilise the piston would be gratefully received.
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