Quote Originally Posted by Jesim1 View Post
You may have miss understood

Your S200 has an 11mm dovetail, but a BSA R10 has a 13mm dovetail, so you need different mounts for it or they do not align correctly, which unfortunately many people don't realise

Thanks for that.......I didn't know that and thought they were the same mounts

What rail is on the HW100 then?

Cheers