Promag GLKA17 for Glock Compatible 45 ACP 21,30 22Rd Black Detachable Promag 45 ACP, 22Rd Magazine For The for Glock 21 And 30. Made In USA. Caliber: 45 ACP Capacity: 22Rd Finish: Black Model: for Glock Compatible Material: Polymer Model Fit: 21,30 Brand Fit: for Glock Capacity: 22Rd Manufacturer: Promag Mfg Number: GLKA17 Model: for Glock Compatible