The GSG-MP40P 9mm pistol converts the original M13x1 metric thread to a standard 1/2X36 thread. It allows you to attach 1/2X36 muzzle device or suppressor to your GSG-MP40P 9mm Pistol. This item does not work for GSG-MP40 .22LR rifles.
ATI ATIMP409ADAPT MP409 Thread Adapter 1/2″-36 tpi Steel Black
