"In sum, the historical record from the relevant period shows

that our Nation did not regard concealed carry and open carry as

interchangeable. The right to keep and bear arms did not extend

to the carrying of weapons in secret, which was regarded as the

practice of the cowardly and the disreputable and as incompatible

with the legitimate exercise of the right of self-defense. Open carry,

by contrast, was understood to be the manner of bearing arms that

gave full effect to the rights secured by the Second Amendment."