Visum für die Hölle was released in the year 1972。Visum für die Hölle is also called as Black Gunn, Schwarzes Dynamit, Pistola nera - spara senza pietà, Pólvora negra, Musta ase, Mavra pistolia, Gunn la gachette。

The Black Power gang murdered Gunn's brother, because he deturned some money belonging to them. It could be justice, but Gunn has family feelings, plenty of money that comes from his night-club operations, and therefore he can buy himself a number of henchmen to take revenge for his brother's death. When it comes to a showdown between the two gangs, the corpses are countless.

Visum für die Hölle actors and actresses include Herb Jefferson Jr., Lavelle Roby, Martin Landau。