I am new to this forum, however not new to the scene. I played back when it first came out at the original riffle range nuketown. I left as life happened with kids. Now trying to get back into it. This day and age its advanced alot…
Long story short i picked up some CYMA CQB M4’s cheap and then went on a rampard spendong spree for parts when AUSGEL had there sale on the first time…
Heaps of stuff… anyway… ended up trying all this metal internals and springs and went all out… lets just say i went through 4 x cyma nylon boxes mucking around and never really got it working properly… i went to a few games and then parked it…
Well i am back again and with new knowledge… seems it hard hobby to drop… haha
I understand now the limtations of the nylon box and i am comfortable stripping a gearbox and even attempting shiming so i am happy with the investment in my tech skills…
BUT… this is where this MOSFET comes into play… seems like they are either super expensive or i am not knowing what i am looking for…
So for my current build i returned to basics, i have the following i am yet to test in a game. Just wanted something that works… hope it will…
CYMA nylon gearbox
Nylon piston (to keep everything nylon)
alloy double o ring Cylinder Head & Nozzle
alloy double o ring piston head
1.18 unequal spring
ausgel yellow 460 long 30k motor
titan 7.4v 6000mah nunchuck battery
35cm polished barrel
rizer hopup
To me this is peaking the safe limit to a nylon, yes could maybe do something more but not sure or cant find appropriate parts. So i want to use the above and learn and plan the stage 2 and up… maybe even hpa if i can afford as jesus this tech has advance since the old school gen 8 …
I joined this forum as seems the place to get good info and real world experince from experienced people that stayed in the game and would love your assistance.
MOSFET
what do i really need… i just wanna take the pressure of the switch so i can run 11.1v without killing it. I know nylon has it limits with M springs etc so most likely will try a metal gearbox. I am not after a leviathan or programable thing just basics?
can i make one myself, would be keen to investage and have thoughts?
i understand the soldering however need to learn but any tips as i have heaps of shit to practice on.
where can i get a basic one or whats advice for this.
basically i need help and knowledge to take the next step…
can i run heavier springs with nylon box and mosfet. Is it logical or worth it.
Any advice around this topics would great. First post here.
I run a number of nylon gearbox CYMAs on 11.1v without problems, There is plenty of safe margin left in your configuration as they easily handle M100 springs and metal gear setups (with the correct anti-reverse latch). Most are running around 300fps when tuned with the correct ported cylinder
The only issue has been with the trigger when constantly running in semi-auto mode as it tends to wear and bind in the thingy with the contacts
@RokSolid has experience with mosfets that suit CYMAs
Yeah, the carbon build up from arching in the switch block in my case made it super sticky and almost double press trigger to make it fire. think i had a few compounding issue when i was trying to do full metal internals, to big of a spring and motor i was using could not pull properly.
I think i will make another gearbox and try again and resist the need to do full auto, as 11.1v is super fun.
Like Wombat, I’ve had plenty of nylon CYMA gearboxes in different builds and haven’t had any issues running an 11.1v lipo in them. Definitely one of the better nylon boxes on the market. Haven’t had any contact issues at the trigger trolley though… maybe I’ve just been lucky.
I can definitely vouch for the CYMA full metal gearboxes as a drop in replacement for the orange nylon ones. Very reliable, don’t break and can run big springs in them with no issues. I think the stock spring is around 1.4mm from memory, and usually hits at around 320FPS.
The two M4s I have running metal CYMA boxes are all running M90 springs and are sitting around 280, usually my target FPS. Very understressed and bulletproof.
First things, yes the CYMA has a 460 motor, but it is the same length as a 480. If you are changing the motor get a 480! Even a stock motor from an SLR or Wells in 480 is going to be better than the CYMA motors.
DO NOT use a double o-ring piston head. Singles are much better suited unless you are in airsoft building a mega FPS DMR style airsoft gun. The second o-ring will only remove fps and create more drag on the system.
just a green o-ring is fine, the cyma piston heads are not too bad.
I’ve seen a lot of CYMAs run 11v with a 1.18 or m90 spring for quite a while with no issue, eventually the trigger block will cause issues, usually just a gentle file and quick alcohol wipe sorts it.
I would run an M90, an pick up another gearbox to play with, they are only 17.70 right now… so get a few and run em hard!
If you do want a basic ETU, the T238 basic is a great cheap option, I use loads of them.
Again, I wouldn’t recommend being too fussed until it breaks… but I would change it because I change everything (compulsive tinkerer!). It is better value to not be like me!
Use the code GBNOBODY for free shipping, they are pretty quick even though coming from China, usually about 8 days!
Would never of though of the Double o ring piston head reducing drag… makes sense now you say it. Also the 480 motor, again did not know that and the “basic DTU” and the website, perfect.
And yeah, i think i am a tinkerer also … love making gearboxes… weird but yeah… some get it some don’t, whatever floats your boat type thing.
Exactly what i needed!. made my Friday at work a little bit better! i now have the weekend to take all this in and figure it out
Make sure to take your original nozzle and cylinder head in with you, had ausgel try to give me wrong length several times in store.
Still have my Cyma’s and we’re one of my loved blasters😎
Alloy oringing cyma cylinder head and nozzles are very hard to find atm, they have been out of production, even though the cyma is finding massive popularity internationally right now.
I use LDT tpiece, cylinder head and nozzle, and if you want to retain the use of cyma mags just trim the ldt tpiece’s feed tube down a bit. The tpiece will also need a little bit of fattening up on the wings to keep it located- I use a couple of layers of aluminium tape around them, a bit crude but works a treat.
I remember quite some time ago that an American supplier told me that CYMA was dropping the Gelblaster side of their brand and going back to concentrating on their Airsoft products.
Apparently they were testing the waters with their Gelblasters to gauge the market, but the Market back then didn’t have any demand in the USA or UK/Europe at the time.
Possibly a bigger market now with the popularity of Gelblasters rising from becoming more well known in those countries, but was my concerns at the time regarding the future availability of CYMA parts for Gelblasters IF they were pulling out of this hobby.
From things I’ve been told by a very respected member of the gel community… And a few others…
JUND… is cyma but gel. They are the gel blasters in nylon flavour we all know.
CYMA in metal is/was the Airsoft CYMA’s factory, sharing with JUND…
Allegedly the owner of CYMA and JUND share a family name but are not the same owner… brothers I have heard but irrelevant to us.
CYMA tested the waters with their metal range of gel blasters. And the metal gearbox sent to JUND for the best value blasters I have ever seen, the nylon CYMA/JUND with the metal CYMA gearbox.
Yes there was only the Australian market at the time, which we all have to agree is pretty niche.
CYMA is the biggest Airsoft manufacturer in the world. They would spend more on RnD than most other Airsoft companies make. There is a reason they are proper good value for the money.
Gel has taken off in China and many Asian countries, it’s getting good traction in the USA, and even starting to see EU get interest.
I think it is only a matter of time before the legendary metal CYMA makes its return… and please… bring back the metal gearbox in the nylon CYMA. Best $300 anybody can spend on a blaster.
… love making gearboxes… weird but yeah… some get it some don’t, whatever floats your boat type thing. 
100% agree. Completely unnecessary.
