Glock G20 Gen5 MOS 10mm Full-Size Pistol – Optic-Ready, Fiber-Optic Sights, 15+1 Capacity
The Glock G20 Gen5 MOS brings full-power 10 mm performance to Glock’s latest generation, pairing a factory-milled MOS slide with the Marksman Barrel, enhanced controls, and a generous 15-round magazine. This example adds upgraded steel rear and red fiber-optic front sights for fast, daylight-bright aiming, making it a standout choice for shooters who want modern features, stout chambering, and optic-ready flexibility in a proven Glock package.
Condition
Overall Condition: Excellent – showing only faint signs of prior use or handling.
Bore Condition: Excellent – clean, mirror finish with crisp polygonal rifling.
Specific Condition Notes: Mild scuffs from normal handling are present but do not affect function.
What’s Included
- Glock factory hard case
- 3 × 15-round Glock polymer magazines with orange followers
- Factory MOS adapter plate kit with screws (sealed bag)
- Trijicon sight components (sealed bag)
The Gen5 MOS slide features Glock’s nDLC finish, front and rear serrations, and a factory optic cut that accepts the included adapter plate kit. This was Glock’s first optic-ready full-size 10 mm offering when it debuted in 2023, giving users a turnkey path to red-dot capability.
Inside the slide, the 4.6-inch cold hammer-forged Glock Marksman Barrel delivers increased accuracy with polygonal rifling and a recessed crown. The upgraded red fiber-optic front post pairs with a steel square-notch rear for a clean, high-visibility sight picture, yet the MOS cut still leaves plenty of real estate for a slide-mounted optic.
The full-size polymer frame incorporates interchangeable backstraps, a flared mag-well for quick reloads, ambidextrous slide-stop levers, and a reversible magazine release. Coupled with the 5.5-lb striker-fired trigger, the pistol maintains the familiar Glock feel while benefiting from Gen5 refinements.
Chambered in 10 mm Auto, the G20 Gen5 provides 15+1 rounds of hard-hitting capacity suited to hunting, defense in bear country, or duty use. The robust build, modern ergonomics, and optic-ready convenience make this customized example attractive to shooters who want versatility without adding aftermarket work.