Product Description Upgrade your Sig Sauer P365 with the XTECH TACITCAL MTX 365 magazine extension kit, designed to add +3 rounds while also improving grip and control. Built from durable polymer in a black finish, this patented extension is engineered to work with factory 10-round P365 magazines (and compatible Wilson Combat P365 Standard frames) and includes a custom-engineered spring for reliable feeding and last-round hold open. An easy-loading follower and installation video QR code help simplify setup so you can enhance capacity and handling without moving to a larger grip module. Product Highlights Adds +3 rounds to compatible Sig Sauer P365 factory 10-round 9mm magazines for increased capacity. Includes custom-engineered extended spring designed for reliable feeding and last-round bolt hold open. Polymer extension provides improved grip and a practical pinky extension for better control. Designed for seamless integration with the P365 magazine body using an innovative patented design. Includes easy-loading follower plus installation video guidance via QR code. Specs Brand Name: XTECH TACITCAL Product Type: Magazine extension / magazine extender kit (with spring) Compatibility: Sig Sauer P365 factory 10-round magazines; standard P365 frame; Wilson Combat P365 Standard Frame Not Compatible With: 12-round or 15-round magazines; P365X, P365XL, or P365 Macro frames Capacity Increase: +3 rounds Caliber: 9mm Color: Black Material: Polymer Country of Manufacture: United States of America Patents: US 11,408,697 B2; US 11,168,954 B1 Weight: 3.0 oz (as listed) UPC: 856822007679 Manufacturer Part Number: XT3020301 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.