Dan,
I shoot a Bushmaster shorty too, but mine is the non AK muzzle break model. I did put a Smith Enterprise MB on it and really like it. I bought the Leepers or is it Leapers 4X AR15 scope and like it for the price that I paid. It cost me about $45 at a gun show. The adjustments hold and the clarity of the optics isn't bad. The overall quality is decent for a scope under $50. Plus I understand that these scopes are "Lifetime Guaranteed" by the importer in MI. So in short, being the extremly frugal (read cheap bastard) person that I am, I feel that I spend my $$ wisely on this scope, and would do it again. If you have any other specific questions drop me a E-mail.
Rob
RKBA!
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It's amazing what a large group of stupid people can accomplish.
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