The FN P90, also known as the FN Project 1990 PDWS, is a compact personal defense weapon (PDW) designed and manufactured by FN Herstal in Belgium Created in response to NATO requests for a replacement for 9x19mm Parabellum firearms, the P90 was designed as a compact but powerful firearm for vehicle crews, operators of crew-served weapons, support personnel, special forces, and counter-terrorist groups.

Source: https://en.wikipedia.org/wiki/FN_P90

Product info:

Total parts: 31

Total part price: 3-4$

Length: 10.2 studs(82mm)

Width: 1.8 studs(14mmm)

Height 4.4 studs(35mm)