Designated marksman rifle

A designated marksman rifle (DMR) is a modern scoped high-precision rifle used by infantry in the designated marksman (DM) role. It generally fills the engagement range gap between a service rifle and a dedicated sniper rifle, at around . DMRs are distinguished from sniper rifles in that they are semi-automatic to provide higher rates of fire (with some also having selective fire to switch to burst or automatic) and have larger magazine capacities (10, 20, or 30 rounds depending on the firearm and operational requirements) to allow rapid engagement of multiple targets. DMRs have to be effective, in terms of hit rates and terminal ballistics, at application ranges exceeding those of ordinary assault rifles and battle rifles, but do not require the extended-range performance of a dedicated sniper rifle. DMRs need to function as part of squad (and possibly at close quarters) and often share some basic characteristics with sniper rifles when compared to other weapons carried in the DM's platoon. They typically have telescopic sights for more detailed observation and aiming, often also quick-deployed bipod for optimized accuracy, reduced recoil and better stability, and an adjustable stock for better ergonomics. Most designated marksman rifles are based on modified designs of an assault rifle currently issued by a nation's military, or on a battle rifle that was formerly issued. The ammunitions used are often of the same caliber as that of the machine guns within the same combat unit, typically a fully powered cartridge such as the 7.62 mm NATO. For example, battle rifles such as the M14, FN FAL, AR-10 and Heckler & Koch G3 were largely replaced during the 1980s and 1990s by modern assault rifles firing the 5.56 mm NATO intermediate cartridge for standard riflemen, but many were accurized and retained as DMRs. Conversely, some nations have also built rifles that were designed for the designated marksman from the ground up. Examples include the Soviet SVD and Chinese QBU-88.

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