Quote:
Originally Posted by ThunderCactus
TM gearboxes don't handle higher velocities very well, you may want to upgrade to a G&P or hurricane gearbox shell. Best thing you can do for velocity is spring, bushings, shims, and systema bearing spring guide. And like 666 says, 3000mah large battery.
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IMO the stock V3 gearbox shell should be just fine for within 400fps, no problem. The V2 might need some special considerations (silent piston head set for example).