Older Armalites with the improved bolt for me, and not a weapon I would put a sight on. Of course, I've had my share of "practical" experience.
For me, this is a "if all hell breaks loose" weapon and ought to kept stripped down and lean. Mine only comes out for dusting and checking operation. I see a few dressed up like their going to the country club dance at the R&G club and laugh, "what ya going to do in the field, if it comes down to that, when fancy items run out of juice". People get these and like to spend money as if they are going to become a member of an elite special forces sniper team. I tell people interested in getting one, make it real, make it for what you need it for. Survival.
I have alot of "for play" items, but this isnt for play, it'* in case for real, really comes.