XTech MTX 365 Magazine Extension for Sig P365 9mm +3

The XTech MTX 365 magazine extension is a capacity and handling upgrade designed for use with SIG P365 magazines. It increases capacity from 10 to 13 rounds while matching the grip length of P365X/XL models to improve purchase and control. Constructed for reliable feeding, the kit includes a custom-engineered spring and is made in the USA. Installation is straightforward and intended for everyday carry and range use.

Key Specifications

• The extension increases capacity from 10 to 13 rounds when installed on compatible magazines.
• Compatible with factory 10-round Sig P365 magazines and Wilson Combat P365 frames.
• Construction uses injection-molded polymer for durable, lightweight performance.
• Includes a custom-engineered spring designed to support reliable feeding.
• Designed to match the grip length of P365X/XL models for improved control.
• Provides last-round bolt hold open with compatible magazines when supported by the firearm.
• Material and finish are provided as a magazine extender kit specific to the P365 platform.
• Dimensions are listed as 1.20 x 3.80 x 6.30 in the supplied product data.
• Listed caliber compatibility is 9mm per supplier attributes.
• Manufactured in the United States by XTech Tactical.

Practical and unobtrusive, the MTX 365 offers Sig P365 owners a simple way to gain additional capacity and a fuller grip without changing the handgun’s profile. Built for dependable everyday carry and range use, it combines a purpose-driven design with reliable components to enhance handling and reload confidence.