ORSIS (Russian: ОРСИС, from ОРужейные СИСтемы, "Weapon Systems") is the trading name of Promtechnologies Group based in Moscow, Russia. Specialising in the manufacture of centrefire rifles designed for a variety of military and civilian applications, ORSIS was founded in 2011 and is currently privately owned. Alongside their centre-fire product line, development of a rimfire rifle for IBU Biathlon competition took place between 2011 and 2013 with the resulting rifle demonstrated to coaches and athletes in December 2013. Rimfire hunting rifles are also planned as derivatives of this system.