HAO's Marui MWS BCG-ecoline is made from the 6061 alloy with Hard Anodizing finishing.
 
It comes with the bearing and steel made weight block 
 
We  also added the HAO developed BCG enhanced sticker. Which makes the problem of jamming caused by worn off BCG polymer cap disappear.
 
Once the cap wears off, it loses the support between the BCG and the receiver. It will cause the BCG lift up during the travel through the magazine BBs feed and jam.
 
The sticker helps support and also smoother the travel ! Make your MWS more durable !
 
Anodizing/surface treatment disclaimer :
Anodizing is a serious chemical process that is fairly unstable. The shade of color can vary batch by batch. We do our best to make the color as correct as possible but we can NOT generate if the shade meets your imagination. Also to be noted that every monitor has its color differences. The color of the object and the color on your computer/ mobile device may be different. 
 
Made in Taiwan
BB type: 6mm 0.2g BBs
Power source: 11.1V PTW, AEG / 9KG green gas GBBR
Power: 90 m/s = 0.81J with 0.2g BBs
J / cm2:  2.835 J/cm2
Design and manufacture for Airsoft use. No live ammunition using function.