The model MF17117 Glock G17 9mm 17 RD factory magazine is manufactured to exacting Glock specifications. The Glock G17 9mm 17 RD replacement magazine with hardened steel insert encased in high-tech polymer features a round count indicator. This original drop-free magazine for your Glock with standard factory baseplate also features a polymer coating that prevents deformation. This high-quality G17 9mm 17 RD replacement magazine with Double-Row Staggered Cartridge Configuration is extremely reliable and provides superior firepower.