Can anyone who has one of these advise what the size of the tube is (the portion of the tube the mount clamps onto)? I want one of these in some sort of a QD mount and was wondering if the Larue Tactical mounts for the Aimpoint Comp M2/M3 sights might work with it. I don't want to use the twist mount because I want to be able to use my pivot mounted 3x magnifier and be able to quick change between magnifier and CEU rapidly if needed.