There are a lot of violent scenes with fists, guns, and sometimes bloody depictions. However, the atmosphere of the film may not feel very cruel.

A few uses of f*ck, other milder words p*ss, sh*t etc

Adolescent smoking and drinking are alluded to through character dialogue.

The gangster smokes.

Drug use is mentioned once.

Some use of pills which are hinted at as being steroids or similar.