D-Boys 5781M M4 RAS II Full Metal Airsoft AEG Black (BY-057M)


  • Model: AG0213
  • Manufactured by: D-Boys (BOYI)


  • D-Boys 5781M M4 RAS II Full Metal Airsoft AEG Black (BY-057M).
  • 1/1 Scale High Performance Assembled Electric Powered Airsoft AEG.
  • Extendable Crane Stock design and store up to 8.4v Twin type battery.
  • RAS II Rail System.
  • Include Flip-Up Rear Sight, Tactical Forgrip & Rail Covers could still be mounted on the long Ras rail.
  • Features a bolt catch system which holds the bolt open.
  • Realistic Bolt Locking.
  • Charging handle allow opening the bolt cover to adjust HOP UP.
  • Full metal magazine accommodate 300 Rounds of 6mm Plastic Bullet.
  • Constructed of Version 2 Metal Gearbox with same mechanism as of Tokyo Marui's.
  • Surprisingly, this AEG shoot out 330FPS muzzle power nicely out from the package.
  • Counter-clockwise 14mm Barrel Extension looks very authentic.
  • Remember to check out our Store for upgrade parts, conversion kit, extra magazine, scope & other accessories.

  • D-Boys model no. - BY-057M
  • Color - Black
  • Weight - 4040g (full set)
  • Length - 708mm/790mm (Extended)
  • Barrel Length - ~280mm
  • Hop-up - Adjustable
  • Shooting Mode - Semi/Fully Automatic
  • Gearbox Type - 2
  • AEG Power Source - 8.4V 1100mAh
  • Fit Battery Pack - Twin (Nickel/Li-Po)
  • Barrel Thread Type - Counter-Clockwise
  • Barrel Thread Diameter - 14mm
  • Magazine Capacity - 300 Rounds
  • Bullet Type - 6mm BB
  • Power (Muzzle Velocity) - 330 FPS
  • Package Includes - D-Boys (BY-057M) AEG, 300 rounds Magazine, Battery, Charger, Barrel Cleaning Tube, 2x Rail Covers, Instruction Manual

    Disclaimer: All airsoft guns sold to US customers are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange.
    We do not ship airsoft guns to the following countries: Argentina, Brazil, Chile, Ireland, Paraguay, Russian Federation, Slovenia, Uruguay.
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    This product was added to our catalog on Friday 07 November, 2014.

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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.