Building Fire 9mm Bearing AEG M4 Gearbox Shell Ver.2


  • Model: AS5172
  • Manufactured by: Building Fire


  • Building Fire 9mm bearing reinforced gearbox.
  • Full metal construction.
  • Include 9mm bearing.
  • Suitable for M4/M16 AEG (version 2).


  • Building Fire model no. - EP-134
  • Color - Black
  • Weight - 314g
  • Suitable for - M4/M16 AEG (version 2)
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    This product was added to our catalog on Thursday 16 August, 2012.

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    Disclaimer: All airsoft guns, gas blowback guns, spring guns are NOT real firearms. All airsoft guns sold to US customers are affixed with an orange tip permanently.