This question is for those who actually have an AEG that has a Guarder SP90 Installed in it. If you do not have an AEG that has this spring, please do not post up.
I parted a M733 Commando with an SP90 spring.
340 fps on a TM SR-16, Guarder SP90, systema high speed gears, guarder bushings, KM TN tightbore, TM internals on a 8.4v 4200 mah IB.
In Pace Requiescat.
This is with the hop set to zero.
In Pace Requiescat.
Thanks for the input guys!