BLACK GUNN (1972, USA/UK) **½ Action, Crime, Thriller dist. Columbia Pictures (USA), Columbia-Warner Distributors (UK); pr co. Champion Production Company; d. Robert Hartford-Davis; w. Franklin Coen (based on an original screenplay by Robert Shearer and an original story by Robert Hartford-Davis); pr. John Heyman, Norman Priggen; ph. Richard H. Kline (Eastmancolor. 35mm. Spherical. 1.85:1); m….