The giveaways are subtle: The Glock logo is absent from the pistol’s grip, where it would ordinarily be imprinted, and the angle of the grip is peculiar. Indentations on the grip, known as ...

Some switches even have a "Glock" logo on the back of them. “It has a symbol of a well-known firearms manufacturer on the back of it. It appears to be a legitimate device," Nokes said. "Absolutely ...

Glock switches do not have serial numbers and the "Glock" logo on the back is fake. But it takes a long time to build a federal case, and the prevalence of these devices is not slowing down.