HAO's classic 416D conversion kits for Marui MWS are CNC machined from an Alloy 7075-T6 billet which is as same material as real firearm. In this kit, you will have 10.4" one piece steel gundrilled barrel end with 1/2-28RH thread , CNC machined and 416D style gasblock, Full RS spec SMR 416D quadrail, Full RS spec steel made barrel nut and 416D type Castle nut ,Hydraulic pressed Enhanced Ambi sling end plate, Plastic-polymer injected V7 grip for GBB , CNC turned OTB buffer tube.
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This time we also bring you out the 6061-T6 MWS bolt case (Ecoline) with Hard Anodizing 
Matte Black HK& G style BCG for your choice !
Check& Buy here: 
https://www.haoptwart.com/product-page/hao-s-marui-mws-bcg-ecoline
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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.