Yeah and that's the important thing is that they have the Doctor footprint which gives you the greatest choice of bases.

The Burris comes with a weaver style base which has a thickness of 3mm but a thinner custom made one could be made.

I just measured mine and the distance from the base to the centre of the glass which is where the dot is located is 16mm.

I also have a Leica Tempus and this is 22mm.

Matt.