Main spring made of Japanese steel (Japanese certificate), type M90 for PTW/CTW/DTW class replicas. The performance obtained by mounting the spring depends on the tightness of the system, the type of cylinder used, the length of the barrel and its diameter.

• Steel non-linear spring
• The spring is compatible with the AEG PTW system or similar specification
• Linear spring/power: approximately 300 F.P.S. with 0.20g BBs
  
• Inner diameter is 11 mm

Weight: 25g

Materials: Steel

Colour: Black

Width (mm): 14

Length (mm): 180