M4 (T.Marui) CNC Steel Enhanced Trigger Box

This enhanced steel trigger box is made by precision CNC machines.  It fits original T.Marui M4 series GBB and Wii Tech receiver sets because it has:

1) standard T.Marui dimension with smooth surface for reliable mechanical operation;

2) high tensile steel strengthens construction for outstanding durability and reliability;

3) modified construction for higher precision and increasing durability;

4) lightening design for reducing weight.