M-16 fires 5.56mm. They’re loaded a bit hotter then most 223. Some ar-15s will fire 5.56mm too, but most are 223. To the eye you can’t see much difference, but they’re not interchangeable. You could fire 223 in a 5.56mm rifle, but not the other way around. Either way, to say an ar-15 is more powerful than an m-16 is absurd.
You can get ar-15s with other chamberings, but not as common.
How, if they had said an ar-10 is more powerful than an m-16, then they’d maybe have a point, as it stands, they’re just trying to set the stage.
Calamity is coming, Trump is just one man, be ready.
Really? I doubt that either of us has ever seen "Most" of the millions(?) of AR15s in America ... that's a lot of rifles ... but most that I have seen are marked for 5.56 or 5.56/.223. One of mine is marked .223 WYLDE (a chamber that's designed to work well with both NATO and SAAMI spec ammunition). I don't recall ever seeing an AR15 marked .223 Remington only.