The Five-seveN is FN's proprietary high-velocity pistol chambered in 5.7x28mm, a bottlenecked cartridge developed alongside the P90 PDW. The pistol uses a delayed-blowback action and polymer frame with a 4.8-inch barrel to achieve the velocity required for the 5.7mm's armor-penetrating potential. With 20-round capacity and dramatically reduced felt recoil due to the light projectile, it offers a unique capability not replicated by any other production pistol. Type: Pistol Action: Semi-Automatic Caliber: 5.7x28mm Capacity: 20 Year introduced: 1998, Belgium Weight: 23.2 oz Overall length: 8.2" Status: Active Military use: Yes Intended use: military, law_enforcement, special_operations, collector