Treasure of Silver Lake

The Good Guys, led by Lex Barker, have a treasure map that will lead them to, erm, some treasure. The Bad Guys, led by Herbert Lom (who seem to have an unlimited supply of men, horses, and ammo), want that map! Much gunplay ensues. Lom gets to whip some of his men into shape (literally), there's a trapper with a frightwig (literally), and another trapper who speaks in rhyme! (imdb)