The FN P90 is a bullpup personal defense weapon designed to provide superior armor-penetrating capability to rear-echelon military personnel who cannot carry a full-length rifle. The horizontal top-mounted magazine holds 50 rounds of 5.7x28mm ammunition. Adopted by over 40 nations and widely used by special operations units, it chambers the same round as the FN Five-seveN pistol. Type: Submachine Gun Action: Semi-Automatic/Full-Auto Caliber: 5.7x28mm Capacity: 50 Year introduced: 1990, Belgium Weight: 5.51 oz Overall length: 19.9" Status: Active Military use: Yes Intended use: Military, Special Operations, Law Enforcement