Some very basic slapstick violence (falling over, things falling on people, etc)
In the first factory sequence, a character, suffering from a nervous breakdown, starts dancing around like a looney ballet dancer squirting oil into people's faces, recklessly pulling levers and otherwise throwing the factory into chaos.
In a jail, a prisoner takes a revolver from one of the guards and shoots at people, but no one is killed. Chaplan subdues him.
A man on the streets is shot to death durring a riot.