An Italian flick filmed in Turkey, Yor tells the confused story of a brave guy with a really awesome medallion on his shaved chest. He fights dinosaurs, protects his woman, and is great with an axe. At some point he discovers that his primitive world is actually connected to a band of nuclear holocaust survivors who have a bunch of futuristic weapons, and he must fight these people - with only his primitive knowhow and a lot of hemp! No really. Hemp is key.
Find Yor, the Hunter from the Future at IMDB.