Wii Tech KSG CNC Alu Hop-up Chamber part No.50 Marui

This item is manufactured by precision CNC machined.  It:

only suits KSG(T.Marui). It does not fit M870(T.Marui) ;

improves smoothness of loading BB;

increases hop-up performance;

strengthens construction and durability;

Remark: for the best air-tightness in the hop-up chamber and smoothness installation, please put some lubricating grease all around 3 hop-up buckings and barrels inside the hop-up chamber.