The Israel Military Industries Desert Eagle is a large-framed gas-operated semi-automatic pistol.  Mark XIX Desert Eagle in .50 Action Express with upgraded finger groove grip.  Current-model Mark XIX Desert Eagles now have a new-style Picatinny rail along the top of the barrel, as opposed to the dove-tail style rail on previous models. Magnum Research also now offers a proprietary muzzle brake for both the .50 AE and .44 Magnum versions to help reduce recoil.