DSR-1

The DSR-1 was designed, manufactured and marketed by the German company DSR-Precision GmbH. Until 2004 it was also marketed by AMP Technical Services, another German firm, which offered it as a specialised rifle for police sharpshooters rather than for general military issue.

The rifle uses a bolt-action mechanism in a bullpup configuration, with the action set behind the trigger group to shorten overall length without reducing barrel length. The bolt carries six locking lugs that engage directly in the barrel rather than in the receiver. The barrel is of benchrest match grade, fluted and free-floating, secured to the receiver by three screws so that it can be exchanged quickly, and it is enclosed in a ventilated aluminium handguard. A muzzle brake is fitted as standard, and a tactical suppressor can be attached to it in seconds by means of a quick-release lever; the suppressor is rated for the full-power ammunition used in the rifle's chamberings and, while it cannot eliminate the crack of a supersonic projectile, it conceals the shooter's position by suppressing muzzle blast. The rear stock and cheek piece are fully adjustable. A holder for a spare magazine is fitted at the front of the trigger guard to shorten reloading time. The trigger is two-stage and adjustable, and the manual safety is ambidextrous, has three positions, and sits above the trigger guard. Accuracy testing with factory ammunition was published by the German magazine Visier in October 2003, using five-shot groups fired from the bipod and measured centre to centre; the French magazine Armes & Tir published comparable results in November 2001 using RUAG target cartridges at 1,000 m.

The DSR-1 has been adopted by the German counter-terrorist unit GSG 9 and by a number of other European police and government units. Users include the Danish Frogman Corps of the Royal Danish Navy, the Unité Spéciale de la Police of the Grand Ducal Police in Luxembourg, the Malaysian Armed Forces, the GIPM in Mauritius, the Grupo Especial de Operaciones of the Spanish Cuerpo Nacional de Policía and the Grup Especial d'Intervenció of the Mossos d'Esquadra, the Republic of China Army in Taiwan, and the Union Defence Force of the United Arab Emirates. Two variants have been produced. The DSR-1 Subsonic is optimised for subsonic 7.62×51mm NATO ammunition; it has a shortened barrel with a faster twist rate intended to stabilise the long, heavy projectiles used in subsonic loads, and the manufacturer recommends that it be fired with subsonic ammunition only. The DSR-50 is an enlarged version chambered for the .50 BMG cartridge, a class of rifle generally employed in the anti-materiel role. It incorporates a hydraulic recoil damping system in the buttstock and an integral forward-venting muzzle brake, also described as a linear compensator, which reduces perceived muzzle blast.