Glock G20 Gen5 MOS 10mm Auto, 4.61 in GMB, nDLC Slide, Full-Size, USA-Made, 3x 15-Round Mags
This Glock G20 Gen5 MOS is a full-size 10mm Auto built in the USA, combining Gen5 updates with the MOS interface and a 4.61 in Glock Marksman Barrel. It includes three 15-round factory magazines and features ambidextrous slide-stop levers, a mildly flared magwell, and an nDLC-finished slide with front and rear serrations. The slide bears "USA" and the frame is marked "MADE IN USA, GLOCK, INC., SMYRNA, GA," with matching serial numbers on the frame and slide; the barrel is un-serialized.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent - Distinct polygonal rifling with a clean, well-defined profile.
Specific Condition Notes: Minimal handling marks from previous use are present. Please refer to the photos for a close look at the finish and markings.
What’s Included
- Glock factory hard case
- Glock owner's manual
- Glock Modular Backstrap set (palm swells)
- Optic adapter plate
- Cable lock
- Three Glock factory 15-round magazines (10mm Auto)
The Gen5 MOS configuration adds Glock's modular optic interface to the G20, with an MOS cut and cover plate on the nDLC-finished slide. Front and rear slide serrations and a beveled slide nose aid manipulation and holstering while maintaining a clean profile.
The 4.61 in steel Glock Marksman Barrel uses polygonal rifling and a revised crown. Paired with fixed iron sights (post front, notch rear), this setup delivers a straightforward, duty-focused sighting arrangement.
Ergonomics reflect Gen5 updates: ambidextrous slide-stop levers, a mildly flared magazine well for smoother reloads, and the latest Gen5 grip texture on the black polymer frame. The Glock Safe Action system and striker-fired operation provide a consistent, standard-weight trigger.
This U.S.-made example is marked with "USA" on the slide and "MADE IN USA, GLOCK, INC., SMYRNA, GA" on the frame. Additional details include proof symbols on the barrel hood, matching serial numbers on the frame and slide, and a Glock Universal Rail with a single cross-slot for compatible accessories.