19cm long robust Aluminium piece with smooth black finish, fully licensed from Gemtech with proper design and markings.
The nature of this design allows it to drop right on top of the MP5s standard 3-lug type flash hider like a QD attachment. Fits Marui, Systema, VFC, Umarex MP5. As such it has no screw type because it needs no threading, it just slides right on.