The Glock 17 Gen4 MOS is a purpose-built duty pistol, engineered for shooters who demand modularity and proven reliability. It’s the full-size 9mm platform, now featuring the Modular Optic System for direct red dot mounting without custom milling. Since we added it to our lineup in mid-2024, it has consistently ranked among our top-selling handguns for its straightforward upgrade path and rugged performance.
Key Features
- MOS (Modular Optic System): Factory-milled slide accepts a wide range of popular micro red dot sights using included adapter plates.
- Gen4 Enhancements: Features interchangeable backstraps for customizable grip circumference and the dual recoil spring assembly for reduced felt recoil.
- Proven Reliability: Built on the iconic Glock 17 platform with the Safe Action system and a 17+1 round capacity.
- Ready for Duty: Includes three magazines and the complete MOS mounting kit for immediate optic installation.
- Durable Finish: The nDLC finish provides exceptional corrosion resistance. Our staff noted its toughness held up perfectly through multiple aggressive cleaning cycles.
Specifications
| Model | Glock 17 Gen4 MOS |
| Caliber | 9x19mm |
| Barrel Length | 4.49″ |
| Overall Length | 7.95″ |
| Height | 5.47″ |
| Weight (measured) | 3.2 oz |
| Frame | Polymer |
| Sights | Standard Glock polymer sights (MOS cut) |
Frequently Asked Questions
What optics fit the Gen4 MOS system?
The included adapter plates allow direct mounting for popular optics like the Trijicon RMR, Leupold DeltaPoint Pro, Vortex Viper, and others. Check the specific plate required for your chosen optic model.
Is the MOS slide cut compatible with aftermarket iron sights?
Yes. The MOS system does not interfere with standard dovetail cuts. You can install suppressor-height or standard-height iron sights for a co-witness setup with your red dot.
Does this model include the Gen4 reversible magazine catch?
Yes. The Glock 17 Gen4 MOS comes with the reversible magazine catch, allowing configuration for left-handed shooters.
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