The red line is when Republicans ended the national assault weapons ban.

Source:
https://www.channel4.com/news/factcheck/factcheck-does-gun-control-work
Also, https://www.instagram.com/p/CeEZJNJu5X2/
Note: In 2004 the Republican Congress refused to renew the assault weapons ban

FactCheck: does gun control work?

States with stricter gun laws have lower firearms deaths - but is one causing the other?

Channel 4 News

@AthenasOwl The assault weapons ban was 80% cosmetic. It was just a show to make people that don't know anything about guns feel good.

Was vaguely annoying to people that do know things about guns because we had to pay $20 for a 30 round magazine instead of $7.

Edit: I changed from 99% cosmetic to 80% cosmetic because I forgot about folding stocks.