Replaces the magazine floor plate adding grip length. Does not alter the capacity of the magazine. Fits 9mm,and 40SW only. For use on XDM models with a rounded internal locking feature. Will not fit standard XD frames. Will not work on (10) round magazines with plastic magazine tube spacer.NOTE: This unit will not work on XDM models with a slotted (square) internal locking feature nor a standard XD frames.
Determined at checkout.