SIDMC

I HAVE THE SAME ISSUES , I HAVE A DVC LIMITED 40 CAL AND 9MM AND BOTH WONT LOCK BACK AFTER THE LAST ROUND FIRED. I JUST BOUGHT THE STI COMBAT MASTER 9MM AND IT DOES THE SAME , MY GUNSMITH HAS WORKED ON THE MAGS AND HAD TO TWEAK THEM TO MAKE THEM WORK , BAD QUALITY CONTROL ON STI'S PART, ESPECIALLY FOR THE $15 GRAND I SPENT.