M870 (T.Marui) 2016 version Hop-up Chamber

This aluminium Hop-up chamber fits all version M870(T.Marui).  It also fits the new version (2016) M870 because it has a small centre hole.

This item is manufactured by precision CNC machined and made of aluminium 7075-T6.  It:
1)   suits all T.Marui M870;
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. 

All products are for airsoft only.  They are not made for real steel firearms.