I have an EOtech holo sight. I like it. have plans to build a somewhat nice full length or mid AR I'd be comfortable shooting out to about 300 yards, no more. I have never heard of the concept of a magnifier till I saw some pics. will teh magnifiers work with my EOtech? and is there a system where one can quickly slide the magnifier out of position and back again? I assume perhaps no larue no care? how much am I looking at? hopefully a bit less than my eotech.