The Glock 17 Gen5 FS MOS combines Gen5 improvements — improved trigger, ambidextrous slide stop, flared mag well, no finger grooves, nDLC finish — with the Front Serrations (FS) slide for enhanced press-checks and the Modular Optic System (MOS) cut for direct optic mounting. The optic-ready full-size 9mm in the G17 format is the most versatile carry and competition-capable Gen5 configuration. Type: Pistol Action: Striker-Fired Caliber: 9mm Capacity: 17 Year introduced: 2018, Austria Weight: 25 oz Overall length: 8.1" Status: Active Military use: Yes Intended use: duty, competition, carry