Joe is an idiot. There have been improvements to .556 in the intervening years, as all ammo has gotten better since the Vietnam War. But it really doesn’t make up for the rate of fire difference between the AR15 and M16.
And, the number of chamberings now available in the short action AR15 are mind boggling. Thousands of online discussions on gun forums can’t unpack that can of worms.
That’s why the AR15 is America’s favorite rifle. It can accommodate all shooters with adjustments to ergonomics, recoil, and the full gamut of sights and technology.
So, the rifle that works for everybody should be banned /sarc.
AR stands for America’s Rifle. The recoil is so light that a 6 year old little girl can shoot it (with daddy nearby, of course) and an 85 year old great-grandmother can shoot it as well.