In 2018, Glock introduced its first crossover pistol ... installed at the back and a duplicate of the frame's serial number laser engraved just below the beveled ejection port.

WITH ONE TRIGGER PULL, THIS HANDGUN IS FIRING 20 BULLETS IN A SECOND. IT’S POSSIBLE BECAUSE OF A GLOCK SWITCH DEVICE. THE SWITCH WORKS BY BLOCKING THE MECHANISM IN THE GUN. THAT REQUIRES A TRIGGER ...