The new Leapers Dovetail to Picatinny (DTP) Rail Adaptor is a great little product that allows Weaver-style rings to be fitted to standard airgun rails.
But there's one problem. It does not provide sufficient clearance to work with airguns where there is a significant "hump" between the scope rails. It requires a flat - or nearly flat - area between the rails. This means, unfortunately, that it will not work with QB78 and QB79 air rifles. It does work with the AR2078, AR2078A, AR2078B and AR2079 models, however.
The Leapers product code for this adapter is MNT-DT2PW01.
There's a photograph of this adapter in the latest blog post at http://www.archerairguns.info
Archer Airguns Inc.
Online stores http://www.archerairguns.com