MadBull Non-Linear Spring Upgrade M130 ( 410 to 440 FPS) for Metal AEG Gearboxes


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MADBULL NON-LINEAR M130 Upgrade Spring

  • FPS Rating: 410 to 440 FPS w/ .20g
  • For Use With AEG Airsoft Guns w/ Metal Gearboxes
  • Variable Pitch Spring Non-Linear
  • Mathematically Calculated Design for Best Consistency
  • Tested and Rated for over 100000 shots
  • Color Coating Protects from Environmental Wear and Tear
  • Made From Super High Grade German Piano Wire

The Madbull Non-Linear M130 Upgrade Power Spring is made from high quality German piano wire and tested to withstand over 100000 shots without losing power. The non-linear design allows for consistent FPS over the life of the spring compared to traditional style airsoft springs. It is highly recommended that you also upgrade to metal bearings, metal spring guide, polycarbonate piston and other components as needed when using this spring to prevent malfunction and damage to your gearbox.

Warning: We at recommend all upgrade / repair parts are installed by a professional as additional upgrades and/or custom fitting may be required. It is the responsibility of the customer to ensure the part is compatible with their gun prior to purchase. We are not responsible for any damage caused during or after installation and are installed at customer?s discretion.

Extra Information


    2 Reviews

  • Posted by Christopher Barr on May 16th 2017


    wrong Items sent

    Air Rattle sent 2 Modify M130 Springs instead of Madbull. When I called I was informed Madbull was out of stock. The springs were ordered for a game and replacements would not be available in time. I was refunded for my order and allowed to keep the modify springs. Excellent customer services to make up for the mistake.

  • Posted by Jose on Nov 25th 2014


    send a message!

    For those long distance shots or extra punch, this spring is worth every penny.