My sn is DXX---- I don't have dimples on either of the mags but will have tomorrow. No sense in sending this to S&W, a proper mag catch/release would fix it as would a better fitting mag, but as long as the dimple fixes the problem and it continues to function as well as it has when it works, I'll be satisfied. I have an XD sub compact in 40 and other than its clunky thickness, I like it very well. The Shield is a better fit for me as a concealment weapon. In two months we will have open carry with a CCW license so size won't be as much of an issue. As of now, if it imprints it is illegal.. I plan to still carry concealed even after that... Again, thanks for all the good info.. Blitzfike