A self-loading pistol designed and manu factured by the Belgian company Fabrique Nationale d'Herstal.The name is a combination: on the one hand, "Five-seveN" is "5-7" (5.7 — caliber weapon, which is .224), and on the other — the first and last letter of the name, written in capital letters, is an abbreviation of Fabrique Nationale.

• Caliber: 5.7x28 mm 

• Ammunition type: 5.7x28 mm cartridges

• Weight: 1750g 

• Magazine capacity: 20 rounds

• Rate of fire: approximately 1200 rounds per minute