They provide comfort by increasing the length of the grip by 1/2 to 1 inch over stock dimensions,They do not alter the capacity of the magazine
They provide an easier means of manually extracting the magazines.
NOTE: This extension will not fit the Millennium Pro or Generation 2 Models,Will not Taurus PT111 Gen 2.
Brand newAn extension for the Taurus PT111 / Keltec P11. Does Not Fit Taurus Millennium Pro Model or the Generation 2 Model. These units replace the magazine base plate. They do not alter the capacity of the magazine and provide better comfort by adding approximately 1/2 inch of gripping surface.