VKS (ВКС) is a Russian bullpup, straight-pull bolt-action, magazine-fed sniper rifle chambered for the 12.7 x 55 mm subsonic round. The weapon is also known by the name VSSK and the additional name Vychlop, which comes from the development program. It was developed in around 2002 for the special force units of FSB. The special round has an overall length of 97 mm. The accuracy is claimed as 1 MOA at a 100 meter range with precision bullets. Cartridge variants :