[TigersEye]

I don't want to check the regs of every state you list but at a glance I can see that .223 is not allowed in Colorado.

Colorado- .24 and up, 70grn or larger bullet/ minimum of 1000ft/lbs at 100 yards

.223 is .22 caliber not .24 so that's right out.

[wrench]

Just take your favorite AR and put a 300 BO barrel on it. BO is for Blackout, not B 0bama.

With just a barrel swap, no other parts to change, it shoots a 30 cal bullet with the ballistics of an AK or 30-30.