Kimmio - I certainly have no problem with your Britannica definitions. They're better than mine because they go into much more detail.
Trump is Liberal - he wants freedom (for the rich) from government. But, similarly, the NRA is Liberal. It stresses the rights of the individual over the rights of the government and the society as a whole. The connection with the wild west is rather silly because the west wasn't all that wild. The myth of the west is that the individual with his gun made his own rules, not the society as a whole.
Actually the wild west wasn't like that, anyway. People did not go around getting into gunfights. Nor was there ever such a thing as the formal, quick draw duel. The quick draw duel was invented by Hollywood. Perhaps the first quick draw movie hero, about 1919, was a French-Canadian from Quebec, the town of Sainte-Hyacinthe. He became a symbol of the American west and all its myths. To explain his French accent, he told people his father was a French Canadian trapper in Arizona, and some place like that.
And shooting with two guns at the same time would have been crazy. You can't hit anything that way. Two guns were useful only in war. Each six-shooter really had safe capacity of only five shots, and it took a while to reload. So the second gun was there to sip the reloading.
In any case, cowboys often carried no revolver at all, because a rifle made far, far more sense. It's hard to hit anything with a handgun.
Gee. I think I went way off the point.