Maurizio Merli
From Internet Movie Firearms Database - Guns in Movies, TV and Video Games

Maurizio Merli (1940-1989) holds a Beretta M1951 as Commissioner Betti in Violent Naples (Napoli violenta) (1976).
Maurizio Merli (February 8, 1940 – March 10, 1989) was an Italian actor who appeared in lead roles in many crime movies. Merli got his first lead role in 1974 owing to his resemblance to Franco Nero. He died in 1989 of myocardial infarction after a tennis match.
Maurizio Merli can be seen using the following weapons in the following films: