From this morning's "Daily Mail"
A UK newspaper. Context is a shooting in Chicago, in which a 14 year old boy was killed, apparently unaffiliated with any gang, but caught in fire intended for gang members:
"believed to be handguns with 'Glock Switches'-which police explained are illegal attachments that allow the weapons to take expanded magazines with up to 50 rounds."
Gotta wonder if the newspaper garbled the info US cops gave them, or if Chicago PD really is that incapable of explaining a Glock Switch.