NRS-2

The NRS-2 (Special Scout Knife) (official GRAU index 6P25U) is a survival knife with a built-in single-shot shooting mechanism designed to fire an 7.62x42mm SP-3 (СП-3) cartridge, similar to the SP-4 cartridge designed for the PSS Silent Pistol).

It was manufactured by the Tula Arms Plant for Soviet Spetsnaz troops in the 1980s, and today sees use as a personal weapon for modern Spetsnaz troops, as well as special law enforcement groups. The NRS-2 is designed for the blade to either be stabbed or thrown at the enemy, or fire at the enemy using the inbuilt shooting mechanism at ranges of up to 25 metres.

Shooting mechanism
In order to use the inbuilt shooting mechanism, the opening lever is pressed, and the barrel rotated out of the knife handle, the cartridge is inserted into the firing chamber and the barrel is then inserted back into the handle and rotated back into place using two prongs that fit into the outer latch. The lever on the right side of the NRS-2 is then cocked while the safety catch located beside the barrel is turned to the "fire" position. Then the user's left hand is used to hold the knife blade, and the right hand to hold the knife handle, with the right index finder being placed on the trigger, which is located above the safety catch beside the gun barrel.

NR-2 survival knife
A modified version of the NRS-2 without the shooting mechanism was also developed, designated the "NR-2", with the shooting mechanism being replaced with a container with other survival equipment.