The Floating Outfit 58 by J.T. Edson

Things were looking bad for Red Blaze. First somebody put an arrow into his partner; then somebody put a bullet into a friendly Apache girl from the reservation. Somebody wanted the Apaches on the warpath, and to do it they had to get Red out of the way. But Red had a friend, a certain small Texan with a tall reputation. Name: Dusty Fog.