Added a pierce grip extension to my 10 round shield plus magazine recently. Makes the 10 round flush magazine fit my hand perfectly and they feel like they should have come on the magazine right from Smith & Wesson.
I have not fired the gun with them on yet but rounds went into the magazine exactly like they did with the OEM floor plate and the magazine inserts and ejects out of the gun normally.
Couple pics:
I have not fired the gun with them on yet but rounds went into the magazine exactly like they did with the OEM floor plate and the magazine inserts and ejects out of the gun normally.
Couple pics:

