The SPR concept was originally proposed by Mark Westrom, currently president of ArmaLite, while working at Rock Island Arsenal in 2000. Navy, is a heavily modified light designated marksman variation of the M16 line of infantry weapons, chambered for NATO standard 5.56×45mm ammunition. The SPR, used by Special Operations Forces of both the U.S. The weapon was developed by the Naval Surface Warfare Center Crane Division for US special operations units, not for Navy units in general.
The SPR was eventually type-classified by the U.S. SPR initially stood for Special Purpose Receiver, but that nomenclature has been replaced as the weapon became a stand-alone weapons system, and not just an add-on upper receiver assembly (part of the proposed SOPMOD upgrades). The United States Navy Mark 12 Mod 0/1 Special Purpose Rifle ( SPR) is a semi-automatic designated marksman rifle that was in service with United States Special Operations Forces in the designated marksman role until 2017, also designed to be shorter than standard weapons.
Naval Surface Warfare Center Crane Divisionġ0 lb (4.5 kg) (fully loaded, w/heavy barrel added with a optic)Ģ,750 ± 20 ft/s (838.2 ± 6.1 m/s) w/Mk 262 Mod 1 ammunition
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