This item is manufactured by precision CNC machined. It:
1) only suits KSG(T.Marui). It does not fit M870(T.Marui) ;
2) improves smoothness of loading BB;
3) increases hop-up performance;
4) 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.
