SGM Tactical .45 Cal Glock Compatible Pistol Magazine 26 Round Black. Specifications for SGM Tactical .45 Cal Glock Compatible 26 Round Pistol Magazine: Manufacturer: SGM Tactical Gun Make: Glock Gun Model: Glock 21 Caliber: .45 ACP Magazine Capacity: 26 Round Color: Black Condition: New Polymer Body Material Package Contents: SGM Tactical .45 Cal Glock Compatible 26 Round Pistol Magazine What firearm models does the manufacturer say SGM Tactical .45 Cal Glock Compatible 26 Round Pistol Magazine is compatible with? The manufacturer suggests that SGM Tactical .45 Cal Glock Compatible 26 Round Pistol Magazine is compatible with Glock 21SGM Tactical SGMT4526R: .45 Cal Glock Compatible Pistol Magazine 26 Round Black