So my question is, "SO"?
1. The AR 15 sold to civilians does not have an automatic selection. Without it the AR 15 "variant" is just another semi auto like the Ruger Mini 14.
2. A 5.56 is no more powerful shot from a DDM4 7 series than it is out of any other semi automatic that shoots it.
3. A Mustang V6 is a variant of the Mustang GT. But the V6 does not function and operate like the GT does. Same theory applies here. It looks mean and nasty but it operates no different than another semi automatic.
4. You have already stated that appearance is what you are basing your opinion on.
Do you understand?