EMG x Retro Arms CNC Machined Aluminum Hop-Up Unit for M4

  • $55.69
    Unit price per 
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  • CNC machined construction
  • Rotary design allows for easy adjustment
  • Constructed from EN AW 7075 for extended lifespan
  • All necessary hardware included
  • Bucking not included
  • Compatible with most M4 series Airsoft AEGs
  • SOME ASSEMBLY REQUIRED

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