- High Impact Polymer Material
- Withstands Temperatures from -20 F to 350 F
- Adds Two Rounds
This extension replaces the magazine floor plate adding two rounds capacity to Glock factory 20,21,29,40 and 41 magazines. This unit is for use on high capacity magazines only, it will not work on the 10 round M20 and M21 magazines. Not for use on Glock M30 10 round magazines.