Product Description The ProMag GLKA11 is a detachable pistol magazine designed to be compatible with Glock 23 and Glock 27 firearms chambered in .40 S&W. Built with durable DuPont Zytel polymer and a full-length internal steel insert, it&&';;s engineered for reliable feeding and long-lasting performance. This magazine features an injection-molded follower and a magazine spring formed from chrome silicone wire, and it is made in the USA. Product Highlights Compatible with Glock 23/27 pistols chambered in .40 S&W 13-round capacity for range use, training, or spare magazine carry DuPont Zytel polymer body with full-length internal steel insert for added strength Injection-molded follower supports consistent feeding performance Chrome silicone wire spring designed for durability and dependable cycling Specs Brand: ProMag Manufacturer Part Number: GLKA11 UPC: 708279013683 Type: Detachable magazine Compatibility: Glock 23 / Glock 27 Caliber: .40 S&W Capacity: 13 rounds Material: DuPont Zytel polymer body with full-length internal steel insert Follower: Injection molded Spring: Chrome silicone wire Color/Finish: Black Country of Manufacture: USA 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.