FN Five-seveN in 5.7x28mm. High-capacity, low-recoil, armor-piercing-capable cartridge. NATO special ops use. Type: Pistol Action: Semi-Auto Caliber: 5.7x28mm Capacity: 20 Year introduced: 2004, Belgium Weight: 22.56 oz Overall length: 8.2" Status: Active Military use: Yes Intended use: military, duty