I am mounting a scope on my A3. I was wondering how the 2 piece Bushmaster risers compare to the standard one piece? And generally how high of rings do you put on the risers? Low/med/high? Thanks!!!!!!!!!

I'm using low rings on my rifle with a riser...it's just the cheap $15 Tapco one piece, but I'll assume it's the same height or very close to it.  Also, I'm using a set of high rings by themselves on one of my flat tops...assuming you're not trying to mount a scope with a 56mm objective, you should be okay with just the high rings, if you want to do it that way.  Here's some pics:
[img]http://img.villagephotos.com/p/2003-5/188491/AR1_1.jpg[/img]
and
[img]http://img.villagephotos.com/p/2003-5/188491/AR15_3_1.jpg[/img]

Both setups give me a good, repeatable cheek weld at just the right height...of course, my face may not be normal [;)].  Both of these scopes have about a 44mm objective, for reference.