Brügger & Thomet APC9
The Brügger & Thomet APC9 is a submachine gun from Switzerland.
It has been produced from 2011 to present, and it's not to be confused with the similar Heckler & Koch UMP.
White House Down
All of the mercenaries who take over the White House take Brügger & Thomet APC9s from the armory and use them throughout the film. John Cale also takes one and uses it for much of the film. White House Down was the big film debut for the Brügger & Thomet APC9, and it is surely to appear in more films.