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We pre-assemble these finest upper kit for your HAO BD556-KWA which allows you to switch form DMR to CQB(or reverse) setting fast in the game.


Kit including barrel 10.5"/14.5", HLR M-Lok Handguard 10.5"/14.5", BD Gas Block, SFCT flash hider.

** Compatible ONLY with HAO BD556 KWA lower and Gen1 KWA M4 GBBR lower **


  • 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. 

BD556 Upper kit for KWA/KSC GBB (HAO & Gen1 KWA lower)

    • CNC milled upper receivers from alloy 7075-T6 billet
    • Alloy 6061T6 barrel (10.5"/14.5") (14mmCCW)
    • Alloy 7075-T6 milled Gasblock 
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