The GLOCK 31 is a .357 SIG caliber pistol built on the proven Gen 3 platform. It delivers the power and flat trajectory of the .357 SIG round in a reliable, duty-proven package. This model has been a consistent performer for us since we added it in January 2026, becoming a regular reorder due to its popularity and reliability.
Key Features
- Chambered in the high-performance .357 SIG cartridge for superior terminal ballistics.
- Built on the rugged Gen 3 frame with the classic GLOCK “Safe Action” system.
- Standard 15-round magazine capacity provides ample firepower.
- Tenifer finish on the barrel and slide for exceptional corrosion resistance.
- Fixed sights provide a clear, durable sight picture.
Specifications
| Caliber | .357 SIG |
| Barrel Length | 4.49 inches |
| Overall Length | 7.36 inches |
| Height | 5.43 inches |
| Width | 1.18 inches |
| Weight (measured) | 1.9 oz |
| Magazine Capacity | 15 |
| Frame | Polymer Gen 3 |
Frequently Asked Questions
Is the .357 SIG caliber difficult to find?
While not as common as 9mm or .40 S&W, .357 SIG ammunition is readily available from major manufacturers and online retailers. It offers a flatter trajectory and more energy than many standard service calibers.
How does the reliability hold up?
Our experience supports GLOCK’s reputation. We’ve had zero warranty claims on this specific model in over a year of consistent sales, which speaks to its build quality and durability.
Is this model suitable for concealed carry?
The GLOCK 31 is a full-size duty pistol. Its dimensions make it best suited for open carry, duty use, or home defense. For concealed carry, consider a compact or subcompact model.
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