Xtech Tactical Mtx Mag Extender 10Rd To 13Rd For 380 Acp Sig Sauer P365 Blk

The Xtech Tactical MTX Mag Extender transforms your Sig Sauer P365 .380 ACP from a compact carry gun into something with real-world grip appeal. This magazine extension adds three rounds to your factory 10-round P365 mags, bringing capacity to 13 rounds while maintaining the sleek profile you chose the P365 for in the first place. Instead of stepping up to a full-size frame, you get the extended grip feel and control you want by simply swapping magazines—a smart move for shooters who value concealability without sacrificing hand purchase.

Made in the USA, the MTX extender uses a custom-engineered spring that feeds reliably and maintains last-round bolt hold open, so you get function you can trust when it matters. The design is patented and engineered to work with standard P365 10-round magazines on the frame itself. The pinky extension provides actual tactile control—not just aesthetic—so your grip is confident and repeatable shot to shot. Aesthetically, it integrates cleanly with the P365 platform without looking bolted on.

Installation is straightforward, and Xtech includes a QR code that links to a detailed video walkthrough, so you're not left guessing. This extender is purpose-built for the P365 shooter who runs a carry gun but doesn't want to compromise ergonomics or capacity in a compact package.

Key Features

• Adds 3 rounds to standard P365 10-round magazines (extends capacity to 13 rounds)
• Custom-engineered spring ensures reliable feeding and last-round bolt hold open
• Provides extended pinky grip for improved control and tactile feel
• Seamless integration with P365 platform and aesthetics
• Made in the USA with patented design (US Patents 11,408,697 B2 and 11,168,954 B1)
• Works with inward-facing tabs on factory P365 mag body where other extenders cannot
• QR code installation video included

Specifications

Frequently Asked Questions

Does this magazine extender work with all Sig Sauer P365 magazines?

This extender is compatible with factory 10-round magazines for the standard P365 .380 ACP frame only. It is not compatible with P365X, P365XL, or other variants with inward-facing tabs. The MTX design specifically accommodates the standard P365 mag body configuration.

What's the difference between using this extender and buying a P365X or XL frame?

Instead of stepping up to a larger frame, this extender gives you the extended grip feel and extra capacity by swapping magazines. You keep your compact carry gun and gain versatility—carry with the standard 10-round mag for maximum concealability, or load the extended 13-round mag when you want more grip and capacity.

Is installation difficult, or do I need a gunsmith?

Installation is straightforward and doesn't require a gunsmith. Xtech provides a QR code that links to a detailed video walkthrough to guide you through the process.

Will this affect reliability or bolt hold open?

No. The custom-engineered spring is designed to guarantee reliable feeding and maintain last-round bolt hold open function, so your P365 performs as intended.