Glock G34 Gen5 MOS FS 9mm, Long-Slide 5.31 in GMB Barrel, nDLC Black, Adjustable Sights, 17+1
This Glock G34 Gen5 MOS FS stands out as the long-slide 9mm built for precision, featuring the 5.31 inch Glock Marksman Barrel and an extended sight radius. It combines Gen5 updates with front serrations, an nDLC black slide, and ambidextrous controls. Austrian-made with C.I.P. and AT proof marks, this model is listed by Glock as discontinued for commercial sale as of 2026.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are visible handling marks and noticeable finish wear consistent with holster use. The bore remains bright and clean.
What’s Included
- 3x 17-round Glock factory double-stack 9mm magazines
- Glock factory plastic carry case
- Owner's manual
- Glock interchangeable backstrap/palm swell set with beavertails
- Add-on flared magwell (not installed)
The G34 Gen5 MOS FS configuration brings a 5.31 inch steel Glock Marksman Barrel and a long-slide format that enhances sight radius and control. Chambered in 9mm Luger with a 17+1 capacity, it is purpose-built for fast sights and stable tracking.
The slide wears Glock's nDLC black finish and features both front and rear cocking serrations. It includes the MOS cut with the factory cover plate installed, offering the MOS interface without altering the slide profile.
The Gen5 polymer frame includes an integral flared magwell for cleaner reloads, an ambidextrous slide stop lever, and a reversible magazine catch. A frame rail is present for compatible accessories.
Sights are a polymer white-dot front paired with an adjustable polymer rear featuring windage and elevation screws. The striker-fired Safe Action System with a trigger safety tab provides a consistent press, with a listed trigger weight of 5.4 lb.
Manufactured in Austria and marked with C.I.P. and AT proof stamps, this example reflects the Gen5 feature set. Glock lists the G34 Gen5 MOS for commercial sale as discontinued as of 2026, adding context for buyers seeking this configuration.