This steel trigger is made by precision CNC machines.  The fingerplate of this trigger is same as the original MK23 trigger.  It is made for professional shooter and competition needs because this trigger is modified for:

1) High precision dimension increases shooting efficiency and reliability;

2) Dimension is modified for reducing loosen on action bar and frame.  Therefore, it has difference dimension from the original T.Marui trigger;

3) Steel strengthens construction to provide outstanding durability;

4) Smooth surface finishing is used to reduce friction inside your pistol and improve smoothness for your finger.