Glock OEM G31 Magazine – .357 SIG – 15 Rounds – Black – MF31015
The Glock OEM G31 Magazine (MF31015) is the factory-original feeding solution for the full-size Glock 31, engineered to meet the rigorous demands of law enforcement and tactical professionals in 2026. Chambered for the high-velocity .357 SIG cartridge, this 15-round magazine is built with Glock's legendary "Perfection" in mind. It features a hardened steel internal insert encased in the brand's proprietary high-tech polymer. This composite construction ensures the magazine remains dimensionally stable and resists deformation even when subjected to extreme temperatures or dropped onto concrete from significant heights.
Designed for flawless reliability, the MF31015 utilizes a high-quality stainless steel spring and a controlled-tilt polymer follower to guarantee consistent feeding from the first shot to the last. This Gen 4/5 compatible magazine includes dual notch cuts, making it fully functional with both left and right-handed magazine releases. The rear of the magazine body features numbered witness holes for instant round-count verification. While purpose-built for the G31, it is also compatible with the compact G32 and subcompact G33, providing an extended grip and increased capacity for those platforms. For the ultimate in duty-grade reliability and peace of mind, only genuine Glock factory magazines will do.
Includes: (1) Glock OEM 15-Round .357 SIG Magazine.
Key Features
- Hardened Steel Insert: Provides the structural rigidity of a metal magazine with the impact resistance and "slick" feeding of polymer.
- 15-Round Capacity: Maximizes the firepower of the full-size .357 SIG platform while maintaining a flush-fit profile.
- Ambidextrous Compatibility: Dual-notch design allows for use with reversible magazine catches found on Gen 4 and Gen 5 Glock models.
- Witness Windows: Features rear-facing numbered indicators to provide a quick visual of exactly how many rounds are remaining.
- Cross-Platform Versatility: Fits the G31, G32, and G33 models, serving as an excellent high-capacity backup for the smaller frames.
- Glock Factory Reliability: Manufactured to the same strict tolerances as your firearm to ensure 100% cycling reliability.
Product Specifications
- Brand: Glock
- Model: G31 Factory Magazine
- Caliber: .357 SIG
- Capacity: 15 Rounds
- Material: Steel-Lined Polymer
- Finish: Black
- Follower: Anti-Tilt Black Polymer
- Baseplate: Standard Polymer
- Weight: 0.20 lbs
- MPN: MF31015
- UPC: 764503310157
- Polymer Base Plate
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