system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: A total ban on guns won't work in the United States.

Criminals won't abide by the law, and making more won't stop them. 
The only reason we have mass shootings is because of people being screwed up in the head ie: parkland girl admitting to bullying the autistic foster kid, saying he deserved it and it's the guns fault that the school got shot up. 
The state of mind in the United States means we will never have a ban on guns, or we will have an American Viet Cong on our hands.  
I'm all for having "mental health checks" on current gun owners, however if we are to do what the high school kiddos are suggesting and confiscate all "fully semi-semiautomatic high capacity 30 round clipazine assault rifle 15's" then things wouldn't be pretty.
gpt
You're kind of all over the place here. 

A total ban cannot happen because of the second amendment. 

What can happen, and did in the 1990s, is a limit on the more military-style weapons.

As for your criminals argument - the state has a monopoly on force and could allow cops to have any guns they need.