Five-seveN

Overview
The Five-seven is a pistol designed by Belgian weapons manufacturer, FN Herstal. It was developed it to complement its P90 personal defense weapon. Like the P90, the Five-seven also shares the same cartridge (5.7mm x 28mm) that is designed to pierce standard body armor; some advantages of the pistol also include it's low recoil (due to the 5.7mm round), a large 20-round magazine, and weighing in at 726 g (1.6 pounds), it's reasonably light-weight. However, despite these advantages, the Five-seven has not bee widely adapted, primarily due to it's high-cost and unusual concept; despite this, it has proven to be a successful design.

In MGS
The Five-seven appears in Metal Gear Solid for the Gameboy Color; it is one of the first weapons that Solid Snake finds. It also appears in Metal Gear Solid 4: Guns of the Patriots, used by the elite FROG units; it too is available to Snake.