What does the gun symbolize in 'To Kill a Mockingbird'?

the gun symbolizes evils in the books. Such as Bob Ewell accusing an innocent black man.
it doesn't symbolize anything it's the fact that tom gets shot which relates him to a mocking bird

actually, the gun does represent a symbol. also, the gun represents false strength, because, when jem asked Atticus why he doesn't carry around a gun with him, Atticus said he doesn't have to. Atticus also says, you don't gain courage from a gun.( This was when Jem and Scout spotted the mad dog.