Guarder Upgrade Spring for Tokyo Marui PSG1 - 150 m/s

Code: PSG-150
  • Upgrade spring
  • 150 m/s - 492 FPS
  • For TM PSG-1 only

This Guarder upgrade spring is compatible with the Tokyo Marui PSG1 gearbox and provides approximately 150 m/s or 492 FPS muzzle velocity on a 0.2g BB. The spring is made from tempered Si-Cr alloy steel wire to provide the strength and resistance necessary.

Full description



  • For Tokyo Marui PSG1 only
  • Si-Cr steel alloy construction
  • Oil quenched
  • Provides 150 m/s or 492 FPS

Package Includes

  • Guarder Upgrade Spring for Tokyo Marui PSG1 - 150 m/s



Parts & Accessories Type
Internal Parts
Internal Part Type
Patrol Base - Warning Icon
This spring is only for the Tokyo Marui PSG-1 and will not work in any other AEG

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.03kg


Colour Wheel Greyscale
Item Colour
Construction Icon
Si-Cr Steel Alloy wire
Internal Part Construction
Spring Steel

Part Specific

Part for Power Source Type
Weapon Platform
Package Includes
Main Spring

Electric Part Specific

Gearbox Version Compatibility Variant
Tokyo Marui PSG-1 Gearbox

Spring Specific

Spring Manafacturer Power Rating
Approx. M-150
Spring Approximate M/S
Approx. 150m/s, using 0.20g BB
Spring Approximate FPS
Approx. 492fps, 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.