Why do you need the rear to adjust for elevation?
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Just get the best from the start: http://shop.knightarmco.com/ProductD...ductID=KM25650
MBUS Pro...steel, no tool adjustment and very small footprint. They're my new favorite!
I have troy flip ups,troy fixed rear and Colt carry handles. If it is irons only then I prefer the carry handle.
Look at the Burris AR 332