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For: Guarder SP130 AEG SpringProduct Information:
King Arms reinforced Ver 2 gearbox
Modify Polycarb Piston (holding up for now... this is my point of failure)
King arms reinforced steel gears
3500MaH 9.6V Large battery with Deans connector
Full Cylinder, duracon piston head, air seal nozzle etc...
Consistent 470fps(Highest 473, lowest 468 over 30 shots, semi only) with .20's.
No noticable rate of fire difference from the SP120 or Stock (Approx M110) springs.
No significant downside as of yet.
Will probably strip my polycarb piston pretty soon. It was on it's way out with the SP120 that this spring just replaced.
Shoots hard (470) and consistent (Less than 2% velocity variation from highest to lowest)
Easy to install for such a high-powered spring... The non-linear spring manages to be easy to get into the gearbox... but still shoots strong.
It's going to eat my piston soon... I just know it. But that's a con for the piston more than this spring.