Rusty Romeos (1957)

The stooges don't know it, but they are all engaged to the same girl, a gold-digger who plans to get an engagement ring from each of them and then abandon them. When all three show up at her house at the same time, a wild fight ensues, as each stooge accuses the others of making time with "his" girl. The gold-digger gets it in the end (literally) with tacks shot from a repeating rifle.

Comedy