Ultra Torque
pub-8348084515547660

what do i need to upgrade a electric airsoft with a Prometheus m135 spring?
i have this JG ak-47 AEG and it goes 380-410 fps and uses a m120 spring, but i want to upgrade it with a m135 spring and that will make it go 400-440, can anyone tell me what other upgrades i need to make in order to fit this m135 spring...the gun i have already has a ultra high-torque motor and a full metal gearbox, is there anything else i need or can i just pop the m135 spring in there, and be A-OK
http://www.airsoftretreat.com/forums/index.php?topic=28802.0
CAMPAGNOLO ULTRA TORQUE CRANKSET INSTALLATION
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