The GLOCK 31 is a full-size duty pistol chambered in .357 SIG, built on the proven Gen 3 platform. It’s for the shooter who wants the flat trajectory and barrier penetration of the .357 SIG cartridge in a reliable, no-fuss package. We added this model to our catalog in late 2024 based on consistent demand, and it’s proven to be a solid performer from a reliable supplier. On our scale, it weighs a confirmed 3.6 oz.
Stand-Out Features
- Chambered in the high-velocity .357 SIG cartridge, known for its flat trajectory and reliable feeding.
- Built on the widely trusted Gen 3 platform with the classic “finger grooves” frame.
- Features the Safe Action system with three independent safeties.
- Our staff confirmed the slide is compatible with both factory and popular aftermarket sights from brands like Trijicon and AmeriGlo.
- Maintains the standard GLOCK accessory ecosystem for holsters and magazines.
Technical Data
| Caliber | .357 SIG |
| Action | Safe Action (DAO) |
| Barrel Length | 4.49 inches |
| Overall Length | 7.95 inches |
| Height | 5.43 inches |
| Weight (measured) | 3.6 oz |
| Frame Material | Polymer |
| Slide Material | Steel with Tenifer finish |
Your Questions Answered
What generation is this GLOCK 31?
This is a Gen 3 model. It features the classic frame with finger grooves and the original accessory rail.
Does this use the same magazines as other GLOCK models?
Yes. The GLOCK 31 uses the same magazines as the .40 S&W GLOCK 22 and GLOCK 23. You cannot use 9mm magazines.
Is .357 SIG ammunition easy to find?
It is a specialized cartridge. While not as common as 9mm or .40 S&W, it is regularly produced by major manufacturers like Federal, Speer, and SIG Sauer. Availability is best through online retailers.
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