So as we all know, the US has been using the AR-15 and it's derivatives for literally decades now. I personally think the rifle has run its course and needs replacing. The reliablity of these rifles is nowhere near that of modern rifles (like the FN SCAR). Heck, even the old AK-47 is more reliable than the M16. So what do you think is a good rifle to replace it with? I think the SCAR is an excellent option myself.