The Desert Eagle .50 Action Express (AE, 12.7x33mm) is the largest calibre variety of the IMI Desert Eagle familiy. Using the same gas operated mechanism of the .357 semi-automatic pistol. It has a rotating bolt for positive lock-up.The barrel is locked in place, assuring a high degree of accuracy. The polygonal rifling reduces barrel wear and enhances the obturation between the bullet and the bore, thus increasing accuracy. Anatomically formed grip, ideal hand seating angle and comfortable grip dimensions permit rapid, accurate, instinctive shooting. The combat-type trigger guard is designed for two-handed shooting. The Desert Eagle Pistol fires standard factory ammunition. When the last round in the magazine is fired, the slide remains in its maximum recoil position, permitting rapid change of magazine and immediate chambering of a round for instant resumption of firing. Desert Eagle Pistol parts are machined or precision-cast and machined to strict military standards from high-quality steel.

The Desert Eagle .50 is truly an awesome side arm. It is capable of punching through body armor, but has a limited seven round magazine compared to the 9 round magazine of the .357 Magnum Desert Eagle.