Gun control legislation does work.
To use a real life example, the last mass shooting in the UK was the Dunblane school shooting in 1996, when a shooter walked into a school and killed 16 students, a teacher, and then himself. Subsequently, legislation was introduced that banned the ownership of handguns. Now, the ownership of effectively all guns is banned in the UK, and there has not been a mass shooting since Dunblane, and the USA has a vastly higher rate of gun homicide than the UK.
Simply banning bumpstocks, or limiting semi-automatic rifle ownership on its own will not do much. After the Hungerford massacre, also in the UK, legislation was passed banning pump-action and semi-automatic weapons, but this didn't stop the Dunblane shooter, who entered the school with 4 handguns.
As has been previously mentioned, obviously it would be naive to expect gun control, even a complete ban, to eradicate gun violence, however, it clearly has helped in the UK, so it bewilders me that lobbying groups in the USA are pushing for more guns.
To me, being unable to hunt for sport, or whatever else people do with guns, seems a small price to pay to potentially prevent mass gun homicide, and I would certainly feel safer in the knowledge that practically no one is carrying a gun.