FEATURES-Replaces the magazine floor plate adding two rounds capacity to Glock factory M20, M21, M29, M40 & M41 magazines-Used on high capacity magazines only, it will not work on the 10-round M20 & M21 magazines-Not for use on Glock M30 10-round magazines-Works on 3rd & 4th Generations-Works on Glock M30 9-round magazines, enabling the magazine to hold 11 rounds-Made from High Impact Polymer & withstand temperatures from -20F to 350F
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