The required historical scholarship is particularly before the Civil War as after slaves were freed Southern states implemented a series of laws that obviously were meant to disarm free Black Americans. This point is regarded as being a shift away from the original understanding.
OK Corral’s shootout occured in 1881 (after the war).
Also when looking for historical precedent favor is to be given to the commonly accepted practice. So if one town did X and the rest of the country did Y, Y is the correct historical precedent.