P90

Overview
Developed originally in 1989 by Belgian firearms manufacturer Fabrique Nationale (FN), the P90 is intended for soldiers who cannot carry full-size light arms, such as aircraft crews and rear support units. The P90 is designed to provide enough firepower to pierce helmets and bulletproof armor at a range of 200 meters. The chamber is behind the pistol grip in bullpup style, but the cartridges are ejected downward, allowing it to be fired the same way by left- and right-handed users. Fires 5.7mm x 28 ammo. Holds 50 rounds.

Appearances
Better known as the FN P90, the weapon was used by Solidus to execute Olga Gurlukovich and was also part of the weaponry assigned to the Arsenal Tengu. Solidus himself, however, utilized a very different ordnance both from those used by the Tengu commandos and from normal P90 ammunition; these rounds combined an enhanced armor piercing ability (far beyond that of the SS190 cartridge, the proprietary P90 round used to defeat personnel body armor) combined with an explosive incendiary effect. These bullets were demonstrated to pierce the head-piece armor of the Mass Production Metal Gear RAYs, exploding and inflicting a critical amount of damage and later, on the deck of Arsenal Gear, where some deflected rounds (aimed at Ocelot) made contact with the deck and exploded.

The P90 also makes an appearance in Metal Gear Solid 4: Guns of the Patriots as the standard issue weapon for the FROG units. The lightweight build and compact size make the submachine gun the ideal choice for the agile units; it accepts a sound suppressor, as well a visible laser sight and/or flashlight. Notably, it is one of the weapons that may be used in the motorcycle chase after Old Snake meets Big Mama.

Tips
Remember to fire in short bursts, as P90's rate of fire is extremely high and will dry the magazine in 3.5 seconds; this will also increase it's accuracy. In MGO, it can be a deadly weapon to those who wield it, taking advantage of its accuracy for quick head-shots and armor-piercing capability.