Judging by the saddle style, this unidentified cowboy was working in the late 1870s or 1880s. In his holster, he carries a Colt model 1873 single action revolver with hard rubber grips, and he has looped his left arm around a Winchester model 1873 carbine in a saddle scabbard.
On the back of the photo is the light pencil inscription “Indian fighter.”

On the range, in the bunkhouse, the local saloon, or life in general...

This is what real cowboys looked like in 1887. Not as fancy as on TV, huh!