Product Description Upgrade your Smith & Wesson M&P Shield factory magazine with the XTech Tactical MTX magazine extension. Designed to increase capacity and improve control, this durable polymer extension adds +2 rounds for 9mm and +1 round for .40 S&W while maintaining a compact, ergonomic profile. It installs quickly and uses a custom-engineered spring for 9mm applications; for .40 S&W Shield magazines, it requires the factory spring. Textured surfaces and optimized ergonomics help enhance grip and recoil control during carry, duty, or range use. Product Highlights Adds +2 capacity for M&P Shield 9mm (factory 7- and 8-round magazines) and +1 for Shield .40 S&W. Compatible with M&P Shield 9mm and 9mm 2.0; for Shield .40 S&W (1.0/2.0) use the factory spring. Custom engineered spring included for 9mm to support reliable feeding and last-round slide lock. Tool-free, easy installation and uses the factory follower and magazine body (not included). Textured, ergonomic polymer base designed to improve grip and recoil control. Specs Brand: XTech Tactical Model/Line: MTX Product Type: Magazine extension Manufacturer Part Number: XT3015601 UPC: 856822007396 Color: Black Material: Polymer Capacity Increase: +2 (9mm Luger) / +1 (.40 S&W) Compatibility: Smith & Wesson M&P Shield 9mm and 9mm 2.0; Shield .40 S&W 1.0/2.0 (use factory spring); not compatible with Shield 9mm EZ Country of Manufacture: United States of America Shipping Weight (approx.): 0.213 lb 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.