There will always be a black market for it, but making it harder to get means these crimes are overall less likely to occur. Consider the Monterey Park shooting

There will always be a black market for it, but making it harder to get means these crimes are overall less likely to occur. Consider the Monterey Park shooting. The killer used a gun they bought legally and was granfathered in, and shot ammo they also bought legally, to commit a crime of passion in the moment. This wasn't some criminal tapped into the underworld who would be able to source black market ammo. This was a pretty boring 73 year old man who bought it from the store. Take out that access to these weapons, and that crime would not have occurred in that manner. That being said, most gun violence in this country isn't of a mass shooting or a organized crime nature. Most deaths from guns are suicides. Half of all intimate partner homicides are from a gun. Just from having a gun present in the home, a women in an abusive relationship is now 5x more likely to be murdered. These aren't cases where people seek out illegal arms dealers, they happen because the gun is in easy access. There's a reason why this country faces so much gun violence compared to countries that have more sensible positions on gun ownership, and its because of the ease of legal access.