IMO, specific designs would be one of the least important aspects of the training. One of the things that we emphasized in our class was that a person did not need to know all of the design and operation specifics of a handgun in order to safely handle it. As long as they followed the two basic rules, they could handle a weapon without shooting someone or something by mistake (unless, perhaps, it was a P320
), even if they had no idea how to operate that specific firearm. Obviously, a person needs to familiarize themselves with their chosen weapon, but I would much rather they spend the time and money to learn how to fight with one handgun than in learning how a bunch of different handguns work. That can come later and is something that can be done at home by a person with a good training foundation and decent internet search skills.