Irregular Pitch Airsoft AEG Tune-up Spring (Power: M150 480~600 FPS)

Hero Brand AEG upgrade spring is the end result of research into some of the best selling springs on the market. Constructed of high grade stainless steel and formed with an irregular pitch, the upgrade springs roll all of the desirable features found in the most popular springs into one easy to install upgrade spring, with greater reliability and performance than most in the same price bracket.

For experienced players only. Using high powered springs will result higher wear and tear than normal.

Features:

• Irregular pitch spring coils: Variable tension. Reduces stress, wear and tear for your gearbox

• Strength: Made out of stainless steel. Increased tension and durability. Tension lasts 50% longer than other leading brands

• Compatibility: Designed for all versions of Airsoft AEG gearboxes

Always reset your spring by firing one shot in semi-automatic before putting it away.
M120 / 190% or stronger spring upgrade may require reinforcement of other gear box internal parts.
9.6V or Stronger battery may be required to power higher than stock springs.