How a FN P90 Works

Wikipedia:

Type:
Personal defense weapon
Selective-fire carbine
Submachine gun

Place of origin:
Belgium

Service history
In service 1990–present

Wars:
Internal conflict in Peru
War in Afghanistan
Iraq War
Mexican Drug War
Libyan Civil War

Production history:
Designed 1986–90
Manufacturer FN Herstal
Produced 1990–present
Variants See Variants

Specifications:
Mass
2.6 kg (5.8 lb) (P90)
2.85 kg (6.28 lb) (PS90)
Length
50.5 cm (19.9 in) (P90)[6]
66.6 cm (26.2 in) (PS90)[7]
Barrel length
26.4 cm (10.4 in) (P90)[6]
40.7 cm (16.0 in) (PS90)[7]
Width 5.5 cm (2.2 in)[8]
Height 21 cm (8.3 in)[8]
Cartridge FN 5.7×28mm[9]
Action Straight blowback, closed bolt[9]
Rate of fire 850–1,100 rounds/min[8]
Muzzle velocity 715 m/s (2,350 ft/s)[8]
Effective firing range 200 m (660 ft)[8]
Maximum firing range 1,800 m (5,900 ft)[8]
Feed system 50-round detachable box magazine[9]
Sights Tritium-illuminated reflex sight, back-up iron sights.