Philip Luty was a man who was really good at building guns. He figured out ways to make guns at home using tools that you might find in your garage, like drills and files. He didn't like the rules that said people couldn't make guns at home, because he thought that it was important for people to know how to make their own guns in case they needed them for protection.
Some people thought that what Philip Luty was doing was illegal, and he actually got into trouble with the law a few times because of it. But he kept on building guns and sharing his knowledge with others, because he believed that it was important to have the ability to protect yourself and your family.
Today, some people still study Philip Luty's methods and try to make guns at home using his techniques. But it's still a controversial topic, and not everyone agrees with his ideas about DIY gun-making.