Thanks for the input. used a set of sportmatch to48 which modified to fit.These are 15mm wide ,the same ones ive used to mount a scope on my mk2 meteor. removed about 2mm from the base so they clear the cylinder of the airsporter. What ive now done is order a 4x20 scope off the bay because it looks longer and the eye releif may work out right. The mounts that come with the scope look feeble and will soon spread the extra couple of mil. keep you all informed.Thanks
Kev