Quote Originally Posted by Josie & John View Post
It sounds like the mounting for the plastic 2X Diana scope or an early metal 3X. If you unscrew the rail screws, the rifle will be marked DRILLED FOR SCOPE underneath, if it's the mount I'm thinking of.


John
I think the screws that hold them on are 4BA. The trouble with holding a scope rail on like this is that you are putting something with a flat surface (the bottom of the screw) , through something that is rounded (the cylinder) and quite thin. If the screws are a fraction too long , then they foul the back of the piston and the gun wont cock. On one I had, I marked where the screw lined up and then filed a groove on the bottom of the screw.


If you can find a scope and mount, I think it would be possible to remove the scope and fit a modern cheap one in the mounts.
Another option is that some people on here make up a rail out of a bit of tube and fix them to the cylinder with glue (tiger seal?) , which would give the option of more modern / better scops.