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

The Evike.com 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 Evike.com 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

Spring Power Chart. (% / FPS)
FPS estimate based on average power output. Exact FPS result may vary based on alignment, installation, inner barrel, cylinder and other factors.

120% (M90) ~280~340 F.P.S.
130% (M95) ~290~370 F.P.S.
140% (M100) ~320~380 F.P.S.
150% (M110) ~330~390 F.P.S.
160% (M113) ~340~400F.P.S.
170% (M115) ~350~420 F.P.S.
190% (M120) ~360~450 F.P.S.
210% (M125) ~400~470 F.P.S.
235% (M130) ~420~500 F.P.S.
260% (M140) ~450~550 F.P.S.
300% (M150) ~480~600 F.P.S.
M160 : ~530+ 20 F.P.S.
M170 : ~560+ 20 F.P.S.
M180 : ~595+ 20 F.P.S.
M190 : ~625 + 20 F.P.S.

Evike.com Airsoft AEG Tip:
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.