Machinegunner(1976)

Machinegunner is a British crime film following a debt collector from the West Country who decides to play detective. When he starts poking around in local criminal affairs, he quickly discovers he's bitten off more than he can chew. What begins as amateur sleuthing spirals into genuine danger as he tangles with dangerous criminals who don't take kindly to his interference. The film captures the gritty underworld of small-town crime, blending dark humor with genuine tension as the protagonist realizes his debt-collecting skills are no match for the ruthless world he's stumbled into.