Other people had said .22 LR besides you. I wasn’t specifically “targeting” you, pun intended.
There is also a .22 WMR rimfire that is more powerful, but I have never heard of an AR15 made for them. They are pretty much the same price as centerfire .223/.556, with far inferior ballistics. As I said, .223/5.56 is the most common caliber for AR15s.
I haven’t seen the weapon, as you seem to have. That was
partly why I stated what I did.
It seemed to me they weren’t forthcoming.
I’ve kept my nose to the ground, so I wasn’t certain whey
we hadn’t seen it yet. Evidently you ran across something I
didn’t.