Building Fire Special Operation Outer Barrel & Silencer for AEG


  • Model: AS5178
  • Manufactured by: Building Fire


  • Building Fire M4 CQB Special Operation Outer Barrel w/ Silencer.
  • Aluminum constructed outer barrel & silencer.
  • Convert your AEG into special operation looks.
  • Barrel tip end has Counter-Clockwise 14mm (Negative) thread.
  • Suitable for M-series airsoft electric gun AEG.


  • Building Fire model no. - EP-159
  • Color - Black
  • Weight - 248g
  • Material - Aluminum
  • Length - 193mm (silencer) / 130mm (outer barrel)
  • Adaptive End - 14mm Counter-Clockwise
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    This product was added to our catalog on Wednesday 25 July, 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.