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The United States Marine Corps Designated Marksman Rifle (DMR, NSN 1005-01-458-6235; more formally the United States Rifle, Caliber 7.62 mm, M14, DMR) is a semi-automatic, gas-operated rifle chambered for the 7.62×51mm NATO cartridge. It is a modified version of the M14 rifle formerly used by the United States Marine Corps.
Updated MARS-H based L129A2 designated marksman rifle chambered in 6.5 mm Creedmoor with an 18 in (457 mm) barrel, a fully adjustable DMR stock and lengthened hand guard, a Leupold Mark 5HD 3.6-18×44 M5C3 Desert IR telescopic sight with TREMOR3 reticle, a HuxWrx suppressor, an Envision Technology ballistic calculator, and a Pixels-on-Target thermal sight was adopted in 2023.
Within the Royal Marines at least, a MARS-H based L129A2 designated marksman rifle chambered in 6.5 mm Creedmoor with an 18 in (457 mm) barrel, a fully adjustable DMR stock and lengthened hand guard, a Leupold Mark 5HD 3.6-18×44 M5C3 Desert IR telescopic sight with TREMOR3 reticle, a HuxWrx suppressor, an Envision Technology ballistic ...
More recently the SIG 716 DMR has been adopted by the Philippine Army as its new standard designated marksman rifle in 7.62 NATO, with 829 units having been delivered as of early 2020. [22] Portugal: The Portuguese Army uses the Heckler & Koch G28E and FN SCAR H PR as a marksman rifle. [23] [24]
The 7.62×51mm NATO round remains in use in designated marksman rifles such as the Heckler & Koch HK417, SIG 716, FN SCAR, L129A1, Colt Canada C20 DMR and LMT MARS-H based riles to take advantage of the effective range and accuracy potential compared with intermediate rifle rounds.
See: Colt Canada C20 DMR. The LE901 would eventually be the basis of the 7.62 version of the Modular Rail Rifle [9] inheriting several features from the rifle, including the lower receiver design and the ambidextrous controls. Eventually further development would lead to the creation of the C20 Rifle.
The typical service rifle is intended for use at ranges up to a maximum of 300 meters, while sniper rifles are generally optimized for ranges of 600 meters and greater. Designated marksman rifles are designed to fill this gap, typically being employed at ranges of 300–600 metres (330–660 yd).
As a replacement for the DMR, the EMR fills the need for a lightweight, accurate weapon system utilizing a cartridge more powerful than the M16A4's standard 5.56×45mm NATO—the 7.62×51mm NATO. The EMR is also used by Marine scout snipers when the mission requires rapid accurate fire and by Marine Corps explosive ordnance disposal teams.