Building Fire Steel Magazine Valve Lock for WA M4 GBB Black


  • Model: AS5129
  • Manufactured by: Building Fire


  • Building Fire WA M4A1 Magazine Valve Lock.
  • Constructed with steel.
  • Replace WA M4A1 Series Original Parts: Magazine Valve Lock (No.211).
  • As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed.


  • Building Fire model no. - EP-49
  • Color - Black
  • Weight - 16g
  • Material - Steel
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    This product was added to our catalog on Friday 14 September, 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.