The P90 is a Belgian personal defense weapon developed between 1986-1987 at Fabrique Nationale de Herstal. The weapon’s name is an abbreviation of Project, and the number 90 specifies a weapon system of the 1990s.
The weapon was cut in 2013 due to being a third party mod.
Not much of the weapon's assets can be found inside either Shadow of Chernobyl Clear Sky's games code except for a world model prop (used in some armories around the game as a decorative piece).