Product Description The Strike Industries Aluminum Extended Magazine Plate for GLOCK G17 (9mm) / G22 (.40 cal) is designed to improve magazine handling and reloads with a slow-drag, no-snag profile while maintaining maximum magazine capacity. Precision machined from durable 6061-T6 aluminum in a black finish, this extension increases capacity on compatible OEM double-stack GLOCK magazines by +5 rounds (9mm) or +4 rounds (.40 cal). An included aluminum locking plate adds extra locking security for confident use. Product Highlights Extended magazine base plate designed to support smoother reloads with a slow-drag/no-snag profile Fits compatible OEM double-stack GLOCK magazines for G17 (9mm) and G22 (.40 S&W) Adds +5 rounds for 9mm (G17) or +4 rounds for .40 caliber (G22) while maintaining capacity efficiency Machined from 6061-T6 aluminum for strength, durability, and long service life Includes an aluminum locking plate for additional locking security Specs Brand Name: Strike Manufacturer Part Number: EMPALG17BK UPC: 793811765700 Product Type: Extended magazine plate / base plate extension Color/Finish: Black Material: 6061-T6 Aluminum Compatibility: GLOCK G17 (9mm) / GLOCK G22 (.40 cal) compatible OEM double-stack magazines Capacity Increase: +5 (9mm) / +4 (.40 cal) Included: Aluminum locking plate Weight: 0.14 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.