Miroslav Buhin
From Internet Movie Firearms Database - Guns in Movies, TV and Video Games

Miroslav Buhin (at the foreground) holds the Double Barreled Shotgun as Bob McHara in Old Surehand (1965).
Miroslav Buhin can be seen using the following weapons in the following films:
Film
Gun | Character | Film | Note | Date |
---|---|---|---|---|
Double Barreled Shotgun | Bob McHara | Old Surehand | 1965 | |
Single Shot Rifle | US Cavalry soldier | The Valley of Death | 1968 |