First time i open up a v3 gearbox, gotta say it’s quite a new experience.
The alphaking ak may not be best price/performance since it’s priced pretty high, but the build quality is great, piston head is solid metal with 6 holes, and air compression is very tight.
But you might want to change the lubricant, the stock one looks like earwax and does not do its job well
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Hi guys nI am new to this but i am planning to build my own gel blaster ok but some advice would clearly be needed i want to build an ar 15 style blaster i am planning to buy a jing ji receiver and an slr 11.7 inch handguard i also have a cnc 7075 gearbox planning to put a 13:1 gears in with a mosfet and a chi hai 48000 rpm what would you recommaand me thanks
Hi, sounds like you are building an atom bomb. The specs you quote minus the other bits you need to do to make work at all before destroying itself do some searching through here.
What FPS and RPS are you aiming for, maybe aim a lot lower if it’s your first build, especially on the gear set and motor RPM that takes experienced skills to get them to run reliably.
Thats why i need advice whatever the outvome will be i am wiling yo try so i wont any hrlp or advice i watched videos of how to dhom the gears but as i sm a humble perdo i seek help
Thats why i seek help i have watch countless videos of how to shim your gears , angle of engagement etc… but i wont have a big head to risk everything as i am a humble person i will ask for help and seek advice to build this blaster
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I just decided to do yet another gearbox change to my SCAR gen8. Yes, I could just get a different, better quality SCAR, but the gen(not so 8 
) SCAR is a classic. Before, I had put in that unknown nylon gen8/9 hybrid gearbox. With the help of hundreds of 3d printed prototypes, I had finally got semi on my gen8. Now, a nylon gearbox is not enough, and my SCAR must go through another long and painful gender change . I’m putting a steel v3 AK airsoft gearbox, since I don’t have access to steel gel blaster gearboxes. This project will be taking a couple weeks, if not months (if it even works out), so wish me luck 
.
2nd Gearbox (nylon gen8/9)
(and yes, i know it looks like a piece of shit, but it works )
3rd gearbox (airsoft AK)
(and no, that 3d printed trigger is not permanent 
)
As you can see, I’m on prototype 13 of the tappet plate. I have fire select completed, but safety is the real challenge, since its on the other side. I really hope this is not the end of my beloved SCAR 
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I can not recommend such a fast motor for 13:1 gears… depending on desired ROF a little guide:
With 13:1…
A 28k brushless T238 motor gets around 27rps
36k brushless gets around 36-38rps depending on battery and efficiencies in power delivery.
Now a brushed motor of the same speed rating will be similar for slower more torque based motors 28k and under, but increasing speed in brushed motors reduces torque, so you tend to get faster but they reach a point where they are always under load and never reach their potential speed, using loads of extra amps trying.
Generally with 13:1 and a brushed motor, I wouldn’t go over around 30k, if you want extra speed try 12:1 gears for a roughly 5% ROF increase.
For best advice…
What is your desired FPS and RPS, and what is your inner barrel length?
i have a T 238 brushless motor 48000 rpm a 1.9 T 238 mosfet i also have 9:1 gears ifp low resistance alloy metal aeg cylinder 13.5 teethpisto for blowback i know i am being very ambitious for a first time but i am willing to try
i just regret we cannot have metal receiver well anything metal is not allowed here
i will need patience and lots of advices
Can I ask where “here” is? 
Here is Mauritius where everything is vomplicated and simple at the same time i dont think i need to explain this
Not vom complicated gel blaster is on sale here until now no permits or restriction has been made for the public but there are restrictions on blasters
Australia i love that country i been there twice and planning another trip not too soon but soon enough i will love to participate in a skirmish over there sound exiting
Cool, Queensland be the state to get in a few games for sure 
ouch on the no metal! … oh well … hopefully thats not to limiting for your build ambitions. Some of the nicest blasters ive seen/bought are made of high quality polymers. The extra weight is nice but you can add some balast to your stock or foregrip to beef them up a bit too.
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Yes my friend my relatives are in Queensland the cspital of blasters l cant wait to go there and hope to get the chance to participate in a blaster game
Mauritian, hey?
Tu vas adorer cet endroit, mon ami.
Tu es le deuxième Mauricien à rejoindre le groupe… jusqu’à présent. 
One of your mates @Martin ? 
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To clear the air, I wasn’t having a go at you before. It’s only my oppinion that I thought you are a lil ambitious for a first build.
I started low and aim for that 280-300fps while I get the physical build down, it’s all good watching a video and it looks easy, but it aint.
Then I go on the path of build it, break it, build it better.
I was only trying to warn you off your limited specs as that’ll definitely crash your gearbox let alone you’ll likely have to get your mag feed speed up to scratch.
Everything has to work together.
Slap high speed gears in and high speed motor in, but there is everything else too that needs to keep up.
Members like Docbob, Rok and FF are more experienced in this area than I am as I’m happy around that 280 ish to keep my accuracy and get longevity out of gearboxes and all the rest.
Something like you talk, which is fine if you want to dive in the deep end by all means go for it is your blaster. But when you set your blaster up right and can get 340fps with a unequal soft running spring in the M100 range with up around that 27rps it will be out on game day more instead of on your bench all the time.
Good luck and do keep us updated as you go, learn some more myself, and we like pictures
Mo pou met lavaz lor lasenn, mo pou revini pli tar. Mo blam google lor tou zafer haha
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I hate crushing dreams but…
That would make a nightmare of a blaster to get running.
A 48k with 18:1 gears would run 34-36 RPS with 11.1v, even a 7.4v would get up around 23 rps. I’d recommend starting with that. 7.4v on that build would be pretty nice.
11.1v would need a m110-m120 spring, at least tough metal gearbox or CNC gearbox, short stroking sector gear teeth, tappet plate trimmed, and everything will need to be fitted very well, and working well together.
9:1/DSG gears would make that trying to do 70rps, which is not a build I would even attempt!
It was fun enough to get my 46rps DSG running, feeding and sealing, and that was with a 30k motor and 8:1 gears. 9:1/DSG gears are best with slower motors, 33k MAXIMUM imo.
I don’t recommend DSG builds… they just aren’t worth the hassle effort and maintenance. With a good brushless motor and 13:1 or 12:1 the build is only a little slower but so much easier to achieve, and almost no maintenance.
If you are as much a fan of T238 stuff as I am… check out my metal scar or slong junkyard build videos. They are 27rps on the scar and that is my favourite combination at the moment which is a 28k t238 brushless and 13:1.
The slong is 33k t238 brushless and 13:1, and is a beast. Gets 33rps. Plenty fast enough.
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