KWA gearbox

[Spartan]

Hey everyone, I was wondering if anyone could suggest some compatible parts for the 2GX geabox. I am looking at different Systema and G&P parts, but if anyone could tell me some compatible piston/piston heads (designed for an M140) and a high torque motor and gears I would be grateful, thanks.

Spartan.

[John Jensen]

KWA gearboxes bone stock can handle up to a M150 Spring so I would personally run it stock unless you want to spend extra money. In my SR-10 I have everything stock except for a Modify Quantum Piston which has worked out awesome for me so far. As for gears I would recommend to just keep the gears stock unless you are looking for helical or super torque which are not necessary for the gun setup. If you want to run a 140 spring you will be putting more stress on the gears so I would recommend doing a good shim job just to tighten up the set a little more. Other than that I would leave everything stock, THe stock piston heads, cylinder, cylinder head and wiring harness all are good quality and will work fine for a long time. I have worked on alot of them and own two now so I can vouch for the stock internals. My SR-10 is over a year and a half old and I havent had to replace anything (replaced the piston thinking it needed it but it wasnt)

[John Jensen]

what kind of velocity are you trying to get out of it by the way? on mine a SP110 was able to shoot 425 with .20 no problem, and I have put it all the way up to a SP130 which gave me about 450 with .30(all I had for the short period I had it in there.)

[Spartan]

Really? Thanks John. I'm trying to get about 390 with a .25. Could you install the spring and do the shim job?

[John Jensen]

Yeah shouldn't be a problem, if you put in a sp110 you should be pretty close to 400 with .25. Shim job probably won't be too necessary unless you went higher than that.

[Spartan]

OK sounds good, if you could send me a price, I'll try to stop by one day up there and get it installed. Thanks for the help. I contacted AEX and they told me I would need a new piston, piston head, gears, motor and spring before my gun would be a DMR. When they totaled the price it was 330$.... I was wondering if i really need to have a systema magnum, super high torque gears, m160 etc. in my gun...

[John Jensen]

You could do all of that but I would say start stock and work up as you go. Mine shoots plenty good with stock parts, you may go with a longer tight bore if you don't already have one. But use it till it breaks or till you get the money little by little to get the parts.

[Spartan]

I agree, I bought the KWA so I didn't need thousands of upgrades. I have a 590 6.03 prommy, and a G&P Max Accuracy bucking (works better for my DMR?). It shoots super far already, but I didn't know if I needed anything else.

[John Jensen]

actually what did you gun chrono at this weekend? we can check it again at the shop but I got to thinking and most of the kwa m16s are already pushing 400 with .25 so if you ended up putting in a different spring it could be way over the limit. Either way bring it in and we can chrono it and see from there.

[Spartan]

it was chroning at 370 with a .23.