The SAN 511, formerly OM 50 Nemesis, is a bolt-action sniper rifle made by Swiss manufacturer Swiss Arms (formerly AMSD). It was created in early 21st century. It fires the .50 BMG cartridge. It is a derivative of the French sniper rifle Hecate II made by the manufacturer PGM. It has a reported accuracy of 0.5 minute of arc (MOA) at and under 1 MOA at . Users :Used by Special Forces and State Border Service (DSX) : Used by Georgian Special Operations Forces. : Used by law enforcement forces under Ministry of Internal Affairs. References External links Official website AMSD SAN 511 on official website, Swiss Arms OM 50 Nemesis at Modern Firearms Encyclopedia .50 BMG sniper rifles Bolt-action rifles Sniper rifles of Switzerland