Gould & Goodrich Single Magazine Case Duty Holster Glock 20 21 Right Hand Black. A.S.Tech magazine cases are open-top for ease of use but with security like no other. Specifications for Gould & Goodrich Single Magazine Case: Manufacturer: Gould & Goodrich Fabric/Material: Nylon # of Mag Pouch Compartments: 1 Gun Make: Glock Fastener/Closure Type: Open Top Features of Gould & Goodrich Single Magazine Case F.A.S.Tech magazine cases are open-top for ease of use but with security like no other. Package Contents: Gould & Goodrich Single Magazine Case Gould & Goodrich T528-4: Single Magazine Case Duty Holster Glock 20 21 Right Hand Black