In a piece of sad news for gun owners, shooters, Second Amendment advocates, and concealed-carry folks, we note on Wednesday the passing of Gaston Glock, who broke considerable new ground in the design of semi-auto handguns. His guns were something new; polymer-framed, striker-fired, tough, reliable, and aimed directly at the police and military markets, although they gained a big following among recreational shooters and carry advocates. And, as one might expect, a lot of misconceptions grew up around Mr. Glock’s creations as well.