You brought up the concept that these guns were 'high powered'. I was pointing out that wasn't really the case.
This is part of the problem with gun control arguments. As with any law, the proponents need to understand what they are trying to regulate. The public does as well.
If someone says "we only want regulate 'high powered' guns". It can easily turn out they have, in fact, (knowingly or otherwise) banned hunting rifles.
Guns involve technonology. People trying to regulate a technology should try to understand it first.