Glock G34 Gen5 MOS 9mm Long-Slide, GMB Barrel, Adjustable Sights, 3x 17-Rd Mags, CHPWS Plate
This Glock G34 Gen5 MOS is a long-slide, competition-oriented 9mm with a 5.31 in Glock Marksman Barrel and adjustable sights. It includes an aftermarket flat-faced trigger shoe installed and ships with three 17-round OEM magazines. The MOS interface has the cover plate installed, and a C&H Precision Weapons adapter plate is included. Austrian proof marks and matching serial numbers on the frame, slide, and barrel are present.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent - Strong, well-defined polygonal rifling.
Specific Condition Notes: Light handling marks are present. Photos provide detailed views of the finish and components.
What’s Included
- Glock factory hard case (original box)
- Owner's manual
- 3x 17rd Glock OEM polymer 9mm magazines
- Glock polymer magazine loader
- Glock Gen5 interchangeable backstrap set
- C&H Precision Weapons (CHPWS) red-dot adapter plate for Glock MOS
- Original parts
- Johnny Glocks Evolution/Competition trigger system components (in packaging)
The G34 Gen5 MOS pairs Glock's long-slide format with a 5.31 in Glock Marksman Barrel for enhanced accuracy potential. The solid-top slide (no window cut) and extended sight radius of 7.52 in work with the adjustable rear and white-dot front sights for precise tuning.
Gen5 updates include a flared magwell, no finger grooves, and ambidextrous slide stop levers. The reversible magazine release and Safe Action system support practical handling. The polymer frame integrates an accessory rail.
The MOS interface is present with the cover plate installed, and this pistol includes a C&H Precision Weapons adapter plate for the Glock MOS system. This provides a ready path for users who choose to mount a compatible red dot.
This example features an aftermarket flat-faced trigger shoe installed and comes with Johnny Glocks Evolution/Competition trigger system components in packaging. Austrian proof and import markings are present, and the frame, slide, and barrel share matching serial numbers.
Chambered in 9mm Luger with a 17+1 capacity, it ships with three 17-round OEM magazines. The long-slide configuration and Gen5 refinements make this a capable platform built around consistent performance.

