ASG Ultimate Upgrade Spring M170

Code: 16673
  • 170m/s or 557FPS
  • Double Progressive
  • For Airsoft Electric Guns

This Ultimate Upgrade Spring is designed for Airsoft Electric Guns, and is double progressive, meaning that there is variable spacing between the loops, which improves the response that the Spring gives when used with a High Torque Motor. Rated at 170M/S this Spring should yield ~557FPS w/ 0.2g BBs, but this of course depends on your exact internals. ASG recommend that Ultimate Upgrade Components are used in conjunction with this spring.

Full description



  • M170 Spring
  • Yields 170m/s
  • Yields 557FPS
  • Double Progressive
  • Great w/ High Torque
  • Part of Ultimate Series
  • For Airsoft Electric Guns
  • Perfect for DMRs/Snipers
  • Alloy Construction
  • Black 'Chromium' Finish

Package Includes

  • ASG Ultimate Upgrade Spring M170



Internal Part Type

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.04kg
Product Length
Approx. 17.5cm
Product Width
Approx. 1.9cm


Colour Wheel Greyscale
Item Colour
Construction Icon
Internal Part Construction

Part Specific

Part for Power Source Type

Spring Specific

Spring Manafacturer Power Rating
Approx. M-170
Spring Approximate M/S
Approx. 170m/s, using 0.20g BB
Spring Approximate FPS
Approx. 557fps, using 0.20g BB

Size guide

Parts Fitting

Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff. 

Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.

We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!

Unique Parts

Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.

Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.

If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.