The culture in some US states is all about guns, it's only recently that some coffee chains have banned people with fully automatic rifles, but you will still see folk with a pump action in one hand and a coffee in the other.
That's fine if that's the way they are, and it's accepted in the community. Most of the people in some states start shooting guns at at very young age, but gees a 9 year old with a fully automatic weapon ... Accident waiting to happen and it has. I think the laws on these types of guns will be changed in all states very soon.... But enforcing it is another matter. A gun club should really know better