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HAO's HK416A5-OTB(Over The Beach) buffer tube for PTW now is available. 

(VFC/WE/KWA/RS/GBBR coming soon)

HAO's OTB stock is precisely CNC'd from 6061-T6 Alumium Extrusion bar, with Y-Axis milling turrent, we now able to turn the stock in super precision tolerance. 

Scanned from "Military Issued" OTB stock, you now can buy the one true correct dimension OTB stock which you can't buy in the civilian public market.


  • 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: Green Gas 9Kg / 11.1V PTW ,AEG
  • Power: 90 m/s = 0.81J with 0.2g BBs
  • J / cm2:  2.835 J/cm2
  • No primer using function 

HK416A5 OTB Buffer Tube (Military-Issued)

    • A6061-T6 Extrusion
    • CNC turned 
    • Black/RAL8000 anodized
    • Multi spec available
  • Term Of Use:
    All the products are made and design for Airsoft use. Any modification of structure, exterior, appearance or painting, marking or wiping the cover/instruction on the merchandise may lead to violate your nation's law regulation. Customers shall bear the full legal liability after the modification.

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