Hmm, the 556 and 416 are pretty different guns, but I'd stick to the 416. The M4S isn't too bad. Honestly between the 416 and the M4S I'd go with the 416. A lot of M4's out there, and the 416 just stands out =)
What's more important: morality or the freewill? In our society most people would say freewill. But we mustn't forget our morality.
Our morality guides our freewill to do the right thing.