Which has the better gearbox?

[kaotiskt]

I have a G&G CM16 that I've customized, and upgraded. Has a m120 spring, barrel, etc. Stock hop up with greet rubber.

Second is a King Arms M4A1 Colt tm, all stock.

Which gearbox would be the better gearbox to upgrade?

[lurkingknight]

technically the KA gearbox is stronger, but if you were to put faster gears in it, you would need to dremel a chunk out of it. The KA gearboxes have a useless piece of reinforcement in it that limit the size of a portion of the spur gear. That same piece of useless casting also doesn't allow for a 3034 mosfet to be installed in side the gearbox which allows full use of the buffer tube for other things.

The G&G shell is weaker but that's about the only flaw in the g&g.

They are similar manufacturing tolerance, though I think I may give the tiniest of edge to g&g for the ability to take just about any aftermarket part and still work fine. I remember having issues with KA guns but not many. Since prices dropped significantly a few years back, KA was priced at a point where it made no sense if you wanted a metal gun you go with vfc. If you want to save money you go with an entry level gun like the g&g CM. Most guns caught between those price ranges made less sense. You either go really cheap, or for a bit more money over the mid priced guns you go really nice, so I have little input on recent guns from KA.

Internally you might get a couple nicer bits in the KA like a bearing spring guide so you don't have to spend a few more bucks upgrading those bits. I can't recall if KA had it or not though. the CM for sure has a standard metal non bearing guide, and no bearing on the piston.

Externally the KA gun would be better as it's metal if you care about such things.

[kaotiskt]

Wow, that's a good chunk of info. Yeah the King Arms is a metal, fully traded receiver, got the whole gun, with battery, high cap(yay..) and box for 100. Just wasn't sure which I should use as my primary.

If they are simular, than I won't bother ripping apart both guns. I like the style of the stock M4A1, so I'll leave it be and just keep messing around with the g&g.

Thanks for your input!