God's Gun, also known as Diamante Lobo, is a 1976 Italian-Israeli Spaghetti Western cowritten and directed by Gianfranco Parolini (credited as Frank Kramer) and starring Lee Van Cleef, Jack Palance, Leif Garrett, Richard Boone and Sybil Danning. Palance plays the head of a malicious group of bandits and Van Cleef plays a double-role of brothers: a priest and a reformed gunfighter. Leif Garrett plays the main character in the film as Johnny, a fatherless kid who brings the reformed gunfighter to town to avenge his brother's murder.

Instead of being filmed in Italy or Spain as most Spaghetti Westerns were, God's Gun was filmed in Israel and produced by Menahem Golan and Yoram Globus, two years before they bought Cannon films. The main cast's dialogue was dubbed: at least in the case of Lee Van Cleef and Richard Boone (who walked out of the film before the production was finished) it has been claimed in several reviews that both actors did not dub themselves in post-production, and the same thing has been said of Jack Palance's voice.