Enhance your Sig Sauer P365 380 pistol with the MTX 365 380 Plus, a 3-round magazine extension that transforms your standard P365 frame into the extended grip length of the P365X/XL. This upgrade maintains both style and functionality by simply swapping the magazine. Proudly made in the USA, this innovative and patented magazine extension is designed for 100% reliability, offering improved grip and control over your firearm. It is compatible with factory 10-round magazines for the standard P365 380 frame. Please note that it is only compatible with Sig P365 10-round magazines and standard frames. The unique design allows the extender to function with the Sig magazine body, featuring inward-facing tabs where other extenders fail. This ensures seamless integration with the P365 platform without compromising the firearm's aesthetics. A key feature of the Sig P365 mag extension is its custom-engineered spring, which guarantees unmatched reliability and ensures last-round bolt hold open. The MTX 365 +3 round magazine extender includes a detailed installation video accessible via a QR code, guiding you through the straightforward process of upgrading your firearm. Additionally, the extension provides an ideal pinky extension for enhanced tactile feel and control, maintaining accuracy and precision during shooting. The grip extension significantly improves handling without requiring an XL frame, instilling confidence in managing your firearm in any situation.

Compatible with the factory-issued 10-round .380 Cal magazine and the standard frame/grip module, ensuring seamless integration and optimal performance
Features an easy loading follower, designed to streamline the reloading process by ensuring smooth and efficient insertion of ammunition into the magazine
The Sig Sauer P365 .380 Cal magazine extension, manufactured in the USA, enhances magazine capacity and performance, ensuring reliability and precision in use
The design, protected by a patent, ensures complete reliability and functionality, offering a 100% dependable performance in all operational scenarios
The grip extension significantly enhances grip and control, offering improved handling and stability without the need for an XL frame
A custom engineered spring is a precisely designed component tailored to meet specific load, deflection and environmental requirements for optimal performance
P365 experience with one of the most effective upgrades available, designed to optimize performance and elevate your device's functionality

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It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

It is the customer’s responsibility for understanding state laws regarding magazine capacities. Palmetto State Armory abides by all state regulations regarding the sale of high capacity magazines. We DO NOT ship high-capacity magazines with firearms to certain states. We WILL NOT replace high capacity magazines with state compliant magazines. We DO NOT offer refunds in place of the magazines. Please see our terms and conditions for a list or restricted states.