The M-392 Designated Marksman Rifle, more formally known as the Designated Marksman Rifle, and commonly referred to as the DMR for short, is a Terran 7.62 mm Calibur select-fire rifle.
The M-392 Designated Marksman Rifle is an air-cooled, magazine-fed, gas-operated select-fire assault rifle that fires 7.62x51mm ammunition. It takes a fifteen round detachable box magazine, similar aesthetically to the Battle Rifle.
The weapon has a mounted optic capable of 3x magnification, and it possesses a fire selector switch located above the grip of the weapon. The M392 also has a magazine release button which is located directly above the magazine well, behind the trigger.
The weapon has two ejection ports, one on the left and right hand sides of the weapon respectively, so that a left or right-handed shooter can fire the weapon. The 7.62x51mm ammunition is interchangeable with most ammunition from the MAR series Assault Rifles.
The M-392 DMR has an effective range of 900 meters.