Glock Gen 4 20/29/40/41 10mm Auto/45 ACP +2 Round Magazine Extension – Pearce Grip PG1045+ Black Polymer

The Pearce extension replaces the magazine floor plate adding two rounds capacity to Glock factory 20/21/29/40/41 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.