Evike.com Irregular Pitch Airsoft AEG Tune-up Spring (Power: M120 360~450 FPS)

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.

For more info on your Airsoft AEG gearbox please refer to our video guides.
Evike.com AEG Gearbox Guides