This Taran Tactical base pad is extremely versatile as it is designed to work on multiple types of magazines. Taran is currently discovering the full list of magazines that this base pad will be compatible with, as for now they can confirm that the following are compatible - Mec-Gar Beretta M9/92FS 18rd 9mm magazines, Sig Sauer's NEW P365-XMACRO 17 round 9mm magazine & Sig Sauer P226 15 round 9mm magazine, Walther PDP 18rd 9mm magazine, Canik TP-9 & Rival 18rd 9mm magazines. The beveled edge on this base pad is designed to clear most shapes and sizes of magwells. With this simple upgrade to your magazine, you can add anywhere from three to five rounds to your total carrying capacity depending on your configuration. The added weight from this base pad will also help the magazine eject faster and easier during reloads.