The Strike Industries Aluminum Extended Magazine Plate for the SIG Sauer P320 increases 9mm magazine capacity by five rounds and is designed to work with factory 21-, 17-, and 15-round P320 magazines. Machined from 6061-T6 aluminum and finished in black anodize, the plate provides a slim, low-drag profile with durable construction. Weighing 1.97 ounces, the extension keeps added mass minimal while improving reload ergonomics. Its external dimensions are manufactured to comply with USPSA rules.
Key Specifications
- The plate is machined from 6061-T6 aluminum for durable construction.
- The finish is black anodized for corrosion resistance and low reflectivity.
- It adds +5 rounds (9mm) to compatible SIG P320 magazines.
- It fits 21-, 17-, and 15-round SIG P320 magazines.
- The product weight is 1.97 oz for a low added load.
- Product type is a magazine extension / extended mag plate.
- Compatibility: SIG Sauer P320 magazines.
- Design features a slim, low-drag, no-snag profile.
- Dimensions comply with USPSA rules.
Whether used for everyday carry, competition, or range sessions, this extension provides a compact method to increase 9mm capacity while maintaining a low-profile fit in SIG P320 magazines. The lightweight aluminum construction and anodized finish minimize bulk and preserve reliable handling, and the no-snag profile supports smooth reloads and practical use.





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