Well a gun is all of that. Basically, it is a gas-powered slingshot. Now a gun is a specialized tool that makes a very effective weapon. A weapon is an instrument of attack or defense used in combat. Yet even the dreaded lime Jell-O can be a weapon.
Words are weapons, cars are weapons, any tool can be a weapon.
All weapons are dangerous but what makes it dangerous and a weapon is the motivation of the user . So the key to what is a dangerous is not just the tool but more importantly the intent and motivation of the user. Violence and crime seem to be more cultural than having anything at all to do with guns. Blaming guns for the crime is a way to ignore the issues instead of addressing them. A gun has never made a person commit a crime, but they have empowered many people to stop them.