Maddog Airsoft Upgrade Spring

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An airsoft AEG spring made by Maddog Sports. This spring is rated at M150 and should fire at the 492 fps or 150 m/s range using a .20g BB. Triple torque Gears and a Torque motor are recommended for this spring.


  • Rated velocity with a .20g BB: 492 fps or 150 m/s
  • Estimate Range without hop up: 221 feet
  • Joules with a .20g BB: 2.24J

NOTE: Color and Opacity of spring packaging may vary.