B&T BT-122506 1/2X28 TO 3-Lug Adapter for MP5

B&T 1/2″X28 to 3-Lug Adapter that is internally threaded with 1/2″ x 28 threads to attach to existing 1/2 X 28 threaded barrel.

This will allow  the use of 3-lug suppressor, muzzle breaks &  flash hiders.