Glock 17 Gen5 MOS FS 9mm Luger | 4.49" Glock Marksman Barrel, Optic-Ready, 17+1 Capacity
The Glock 17 Gen5 MOS FS brings together the fifth-generation upgrades, the Modular Optic System slide, and the proven reliability of Glock’s full-size 9 mm platform. Factory front serrations, an nDLC finish, and the latest Glock Marksman Barrel make this pistol a turnkey option for shooters who want a duty-length sidearm that is ready for optics and suppressor-height sights straight from the box.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent – Clean, mirror finish, no visible wear.
Rifling Condition: Excellent – Distinct polygonal rifling with crisp definition.
Specific Condition Notes: The slide and frame show a few minor surface scratches and handling marks. The bore remains bright and shiny.
What’s Included
- Glock factory hard plastic pistol case
- 2 × 17-round Glock 9 mm magazines with orange followers
- Glock Gen5 modular backstrap set (4 pieces)
- Magazine speed loader
- Glock MOS adapter plate set (plates 01–04, screws, and hex key)
- Glock factory owner's manual
The MOS (Modular Optic System) slide comes factory-milled and includes the four-plate adapter set, allowing direct mounting of popular red-dot footprints without aftermarket machining.
Gen5 enhancements are all present: the Glock Marksman Barrel with enhanced polygonal rifling and a 1:9.84" right-hand twist, ambidextrous slide-stop levers, a flared magazine well, and a reversible magazine release. Together, they provide improved accuracy, faster reloads, and true left- or right-hand operation.
The nDLC matte black finish on the slide offers increased hardness and corrosion resistance, while front and rear serrations give positive purchase for press checks and slide manipulation, even with gloves.
Inside, Glock’s Safe Action System delivers a consistent 5.5-lb trigger pull and three automatic internal safeties. The full-size polymer frame retains the accessory rail for lights or lasers and accepts the four included modular backstraps to fine-tune grip circumference.
All serial numbers match across the slide, barrel, and frame, confirming original factory assembly. With its optic-ready slide, upgraded barrel, and complete factory accessory kit, this Gen5 MOS FS is ready to serve duty, competition, or personal-defense roles with minimal setup.