Rifle, Colorado is named after a firearm, that is true. It’s named after a rifle that soldiers mistakenly left by a river while surveying, and which was discovered later. Making it named after a soldier losing control of their weapon. I suppose that part of the story isn’t important to her.

Source: https://babel.hathitrust.org/cgi/pt?id=mdp.39015051116740&view=1up&seq=49