That drives me nuts too. The media, gun grabbers and so many others thnat have little knowledge of firearms continually refer to the .223/5.56 as "high powered" when, in fact, it's such a pissant weak little round that it's not legal to use it for hunting in many states. Short of rimfire (.22LR, for example) you have to look hard to find a weaker round.
My AR frames shoot .50 Beo, 76.62x39, 6.5 Grendel. 300 Blackout, etc..all because I like the frame but have little use for the pissant .223.