.50 is sniper round .223 is for small animals. When a weapon came into existence is not relevant to my conversation. I personally care about stopping children from being murdered like every country has done. The word amendment literally means change. That is the point I was making.
I agree with your post, and categorically say that yes, the constitution can be amended. I am addressing the other person who seems to not understand that the muskets of 1800 AD were not 'less hazardous' than a modern weapon.
A .50 is what a musket was in chambered in 1800. the 'small animal round' .223 is what an AR typically fires.