I think I am going to pick up a Bushmaster with the standard carrying handle / iron sights package. I do want to be able to mount a scope, although most use will be iron sights. Looking online, I see one adapter (weaver or picatinny to carrying handle) for about $65 or $75, and a whole bunch that look similar but run anywhere from $10 to $25. Some of these are names I recognize, like DPMS. The only difference that I can see in the descriptions / specs is that the high dollar model says you can remove and reinstall without losing zero. Anyone have any experience / recommendations with any of these systems?