So-called switches, which turn handguns into automatic weapons that can fire 20 bullets a second, are "beyond terrifying," Judge Iain Johnston warns.

There's a growing number of guns being converted into machine guns. Here's why it matters: When someone opens fire with a machine gun, it has the ability to cause more damage, and impact more lives.

A Glock switch, also known as an auto sear or machine gun conversion device, is an illegal aftermarket accessory that converts a semiautomatic Glock pistol into a fully automatic weapon.

Fewer than 14 million units, less than 10% of the Switch, were sold before Nintendo pulled the plug in early 2017. Nintendo’s chief concern will be how to position the new machine — starting ...