The Lautenberg Amendment is a rule that says some people who have been convicted of certain crimes can't buy or own guns or ammunition. It's named after a man named Frank Lautenberg who thought it was important to keep guns away from people who had hurt others in the past.
The rule applies to people who have been convicted of things like domestic violence, stalking, or people who have a restraining order against them. This means that if someone has been found guilty of hurting someone they were in a relationship with, harassing someone, or posing a threat to someone's safety, they aren't allowed to buy or have guns or bullets.
The Lautenberg Amendment was put in place because lawmakers wanted to make sure that people who had a history of violence couldn't easily get their hands on a gun. It was believed that if someone had already shown that they could be violent towards others, having a gun could make things more dangerous.
So, to put it simply, the Lautenberg Amendment is a rule that stops people who have hurt others in the past from buying or having guns or ammunition. It's designed to help keep people safe by making sure that dangerous people don't have access to weapons that could cause harm.