I've stated before that if the technology to easily 3D print slide cover plate selector switches had existed when Glocks were first imported into the US, the ATF might have ruled them machine guns and changed the trajectory of handgun sales and technology in the US over the last forty years substantially. As it was, by the time things like 3D printing and Alibaba shipping became a thing, the Glock horse was well out of the barn and it was the most common semiautomatic handgun on the market. Trying to call it a machine gun would have been King Canute levels of futile.
The increasing prevalence of switches is causing legislative splashback on the state level though, and it looks like Glock is reacting.
