Just like to say I love V3 gearboxes, so easy to take apart and put back together. The ICS gearbox is painted black and the interior of mine looks pretty bad ( looks like overspray on the metal, but doesn't matter, just looks ).
The ICS Ak74 has steel bushings, a weak spring, and a plastic spring guide. ( Not sure if new models have this )
I would recommend a M110 or M120 spring, G&P polycarb piston with a new head, and a steel spring guide.
Easy take down
Large stock to fit bigger batteries
Lots of metal parts
Low initial FPS ( easy fix, new spring, guide, piston / head, tightbore )
Stock feels pretty cheap (hallow sounding, would like a nice solid stock )
Rating: [4 of 5 Stars!]