This is a high quality replacement glock .45 acp magazine from Promag that fits Glock model 21 guns. This magazine is made from Du Pont Zytel polymer and has a steel insert as well as steel feed lips for reliable feeding. Hhas a polymer base and uses ProMag ANTI-FATIGUE LOAD�UM up and STACK�UM up chrome silicon springs. Leave your magazines loaded for years without worry. Magazine has high visibility witness holes along back side.
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Spend more time shooting and less time loading your magazines. We recommend using a magazine loader with this magazine. Select the loader shown below.