I just watched Bone Tomahawk (2015).....I knew nothing about this before going in except that it starred Kurt Russell. If you see the DVD box or any poster for it....you will say - Hey, a western -.....but it is a western horror movie.
Basic story.....American west 1800's....a tribe of Indians come to small town and carry off several people including the woman doctor. When the sheriff (Russell) asks the local Indian expert for help....he tells him that the tribe are cannibal troglodytes cave dwellers that even the local Indians are too scared of to mess with. The sheriff, the doctor's husband (Patrick Wilson), a local gunslinger (Matthew Fox), and the sheriff's old part time deputy (Richard Jenkins) go after them. What ensues is a bloody, gory, no holds barred adventure of cowboys against the killers from SAW or HOSTEL.