This spring from FPS fits most standard AEGs and has been developed for durability and performance.

• Hardened carbon steel
• Variable pitch coils
• Ground ends
• Length: 170mm
• Outer diameter: 14.30mm
• Rating: 105 m/s
• Made in Italy

NOTES:

• The spring rating is calibrated using a 363mm inner barrel and a type D cylinder. Installation with different length barrels and cylinder volumes will affect the final output.
• The power was calibrated using a spring guide and piston head without bearings, using the configuration above, adding bearings will give approximately 2.5m/s increase in muzzle velocity per bearing.
• The manufacturer recommends the use of ball bearing spring guides and piston heads to ensure maximum performance and durability.