The FN P90 is a Belgian submachine gun developed in 1986–1987 by FN Herstal. The 5.7x28 mm rounds type was developed specially for the P90, and has high penetration. However, due to the low popularity of the rounds, P90s which reach the Zone have been converted to use 9 mm rounds. This submachine gun has become fairly popular among well-to-do stalkers and thrill-seekers on tour.