Product DescriptionThe Magpul AMAG 21 SG9 is a 21-round 9mm handgun magazine engineered for dependable performance in SIG P320 and SIG M17 pistols. It features a corrosion-resistant stainless-steel magazine body with polymer sub-components, combining durability with smooth handling. Magpul s proven internal geometry includes a high-visibility, controlled-tilt follower and a stainless-steel spring to help promote consistent feeding. For quick status checks, the magazine includes capacity-indicator windows along the spine starting at 5 rounds and continuing in 1-round increments. A flared, removable floorplate supports positive handling and easy disassembly for cleaning and maintenance, and a paint-pen dot matrix panel helps with magazine marking and identification.Product Highlights 21-round 9mm magazine designed to fit and function with SIG P320 and SIG M17 pistols Stainless-steel magazine body with polymer sub-components for durability and corrosion resistance High-visibility, controlled-tilt follower and stainless-steel spring for reliable feeding Capacity-indicator windows start at 5 rounds and continue in 1-round increments for fast round counts Flared, easily removable floorplate for improved handling and simplified cleaning/maintenanceSpecs Brand: Magpul Industries Model: AMAG 21 SG9 Type: Handgun magazine Caliber: 9mm Capacity: 21 rounds Compatibility: SIG P320, SIG M17 Body Material: Stainless steel (with polymer sub-components) Follower: High-visibility, controlled-tilt Spring: Stainless steel Floorplate: Flared, removable Capacity Windows: Starts at 5 rounds; 1-round increments along spine Marking Panel: Paint-pen dot matrix Color: Silver Country of Manufacture: USA UPC: 840815149323 Manufacturer Part Number: MAG1465-SST Listed Dimensions (L x W x H): 7.0 x 3.0 x 1.5 inDisclaimer: 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.