Re: What removable scope mounts without loss of 0
I like the Warne Maxima QD series rings. they're available in five heights and 1" and 30 mm diameter, also matte, gloss, and silver. They fit a Picatinny or (usually) Weaver rails. They're steel but there is a lower cost aluminum model in the "ultra high" version which is right for AR-10s and AR-15s. I like them for swapping day and night scopes. Also for transporting the scope off of the rifle.
They're strong and retain zero after re-mounting as well as other rings I've tried. Installing vertically split rings is different from installing horizontally split rings in that it requires the halves between the scope and base be in tight contact (four torx screws). The two upper screws tighten on the scope, The lower lever tightens on the rail. If not installed that way (for example tightening the top screws first) they're terrible which may have given them a bad name.