The GLOCK G34 GEN4 MOS is a purpose-built competition pistol with modular optic capability. Designed for shooters who demand speed and precision, it features a longer sight radius and MOS mounting system. We started stocking this in Q1 2025, and it’s become one of our steady sellers, with a noticeable weekend sales spike from range day purchases.
Key Features
- MOS (Modular Optic System) Slide: Factory-milled slide accepts popular micro red dot sights without custom gunsmithing.
- Competition-Ready Barrel: Extended 5.31-inch barrel and slide enhance sight radius and muzzle velocity for improved accuracy.
- GEN4 Frame Enhancements: Features interchangeable backstraps and the improved RTF (Rough Textured Finish) for a customizable, secure grip.
- Dual Recoil Spring Assembly: Reduces felt recoil for faster follow-up shots and increased control.
- Factory Adjustable Rear Sight: Allows for precise windage and elevation adjustments out of the box.
Specifications
| Caliber | 9x19mm |
| Barrel Length | 5.31 in |
| Overall Length | 8.82 in |
| Height | 5.47 in |
| Width | 1.18 in |
| Weight (measured) | 4.7 oz |
| Frame | Polymer |
| Magazine Capacity | 17+1 |
Frequently Asked Questions
What optics fit the G34 MOS slide?
The MOS system uses adapter plates (included) to mount optics like the Trijicon RMR, Leupold DeltaPoint Pro, Vortex Viper, and SIG ROMEO1. Check the included plates for compatibility with your specific optic footprint.
Is this model suitable for USPSA or IDPA competition?
Yes. The GLOCK G34 is a popular choice in USPSA Production and Carry Optics divisions, and in IDPA’s Stock Service Pistol (SSP) and Carry Optics (CO) divisions. Its long sight radius and optic-ready design provide a competitive edge.
Does it include the optic mounting plates?
Yes. The pistol comes from the factory with a set of MOS adapter plates and the necessary hardware to mount compatible micro red dot sights. The plates are stored in the GLOCK hard case.
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