After the Gulf War, the U.S. Army decided that it wanted more "eyes" on the battlefield. The Army developed a specification called the "M-24" which was designed to be a compact binocular that would fit in the pocket of a battle dress uniform (BDU) and be as rugged, have the same magnification, and nearly equal the optical performances of the bigger binoculars. The 7x28 Apache is built to the same tough standards as the M24 binoculars. The new M24 is the first "pocket-sized" military binocular ever issued on a large scale. The optional reticle (left view side) allows for easy range or distance estimation. The specifications for this instrument are: Magnification: 7x, Objective lens: 28mm, Exit pupil: 4mm, Eye Relief: 15mm, Prism type: BAK-7 14.6mm roof prisms, Weight: 14.5 ozs., Field of view: 7°, 367 ft. at 1,000 yards, Light efficiency: 90%, Waterproof and Nitrogen gas filled, Rangefinding reticle in left lens & Focusing System: Individual eyepiece focusing.