Guns and Guts (1974) "Las viboras cambian de piel" (original title) br 98 min | Action, Adventure, Crime, Western | 23 May 1974 (Mexico) br br Guns concerns a hired gun determined to head out on his last mission and then retire with a woman. The job involves rubbing out a sheriff who conceals his whereabouts in an ancient monastery. Thus begins a wicked, prolonged cat-and-mouse game between the two men, leading up to an operatically violent finale. br br Director: René Cardona Jr. br br Writer: Fernando Galiana br br Stars: Jorge Rivero, Pedro Armendáriz Jr.