The P90 is a compact personal defense weapon designed by the Belgian company FN Herstal. It features a unique bullpup design, which means the action and magazine are located behind the trigger, allowing for a shorter overall length without sacrificing barrel length. This makes it highly maneuverable in tight spaces. Chambered for the 5.7×28mm cartridge, the P90 offers low recoil and high velocity, making it effective for both military and law enforcement use. Its distinctive top-mounted magazine holds 50 rounds, providing a significant ammunition capacity for sustained fire.