JoJo's Bizarre Adventure: Part 3--Stardust Crusaders Vol 4

From the VIZ Media edition

Avdol has a bullet in his brain, and the heroes face a seemingly unbeatable pair of enemies--the Emperor, whose spirit takes the form of a gun, and the Hanged Man, which dwells in mirrors! With death coming closer in every piece of glass, do Polnareff and Kakyoin have a chance?

Source: Anime News Network Encyclopedia