Hello, I was thinking about buying a HPA gearbox and converting it to gel blaster. If anyone knows how to convert a HPA engine to a gel blaster, I would love to know that. Currently I am still on the aeg gel blaster platform and in my opinion, HPA engines are cool. I was thinking about buying a Mechlabs XX-MOD v2 hpa gearbox because it has no electronics, which seems cool to me when I convert it into a gel blaster. And also, if I want to make it with zero electronics, what type of magazine is common locally and is easy to convert to a spring powered magazine. I like to also know how to convert motor-powered magazines into spring powered. Sorry if this text was too long.
I can’t comment on HPA conversion, it’s not something I’ve ever dabbled in.
I would imagine converting a motorised mag to spring would be a tricky thing to attempt. But not impossible. You’d have to figure out how to modify the mag shell to allow the motor to be relocated to the top, redesign the feed tube and come up with a suitable spring and follower to suit the mag size and length.
I’ve done some pretty out there drum and stick mag conversions before… but I don’t know if the amount of gain from doing it would justify the work required. 
It’s not something I’d attempt unless it was pissing down rain and I was bored out of my brain looking for something to fettle. 
If you do have a crack at one make sure you post any results up here. 
Best of luck with it. 
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I will open with I don’t do HPA. Not my jam at all, and I will leave that side of it to the HPA lads.
For the mag without power using only a spring… Azraels tried it, took several years and was largely a failure. I will leave the controversy aside and focus on the mag.
Firstly, I stated from the initial announcement that they were going to try it that I felt it was never going to work in the stated form. IMO unless the tpiece is designed to suit the mag and releases all pressure from holding the gels back it is only going to be problematic and inconsistent. And that is what they have as the final product!
So, basically, if you can pull off a “high cap” or even “mid cap” mag that works ONLY on spring feed, you will be doing better than a company that lost many tens of thousands of dollars trying. Now that isn’t to say it can’t be done! I am sure it could be, but as I have always said, a tpiece would need to be designed to suit the mag IMO.
There is loads of people here that have built Kythera HPA blasters that run normal powered mags, my understanding is they add a switch in the box to activate power to the mag when the trigger is pulled.
Best of luck with the project, nothing is impossible; but if an easier option exists that is proven to work I would be taking that.
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I was looking at how those hicapa mags work and was wondering if they could be ported over to gel now that gels have gotten harder and theoretically would just need a weaker clock spring
It’s on my to-do list of experiments for when I get motivated enough 
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I reckon the LDT springs mags would be great for the other soft sport with a gelblaster etu with mag terminals so don’t have to wind them up.
Update: I found a spring powered mag in my country. But there is a problem, the mag is high catch and I’m working on a low catch receiver. Does anyone know how do I make it click in my receiver? This is the only spring powered mag that is available.
The spring powered mag is a Yousun/Chuangyan Bottle Mag.
99% sure that’s got a motor in it like those LDT spring mags that have the feed wheel at the top…
Yeah it’s a powered mag
All the spring does is push the gels into the feed wheel, in this case a worm gear, to give consistent feeding and feeds even if the blaster is upside down or sideways.
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Ah okay thanks, I guess I will be using those for my CYMA M4. Also, how do I file the catch on the mag? I’m still a beginner and don’t know what is file/sanding down the mag catch.
It’s pretty much using either a drill or a Dremel and carefully cutting a new whole on the mag in the location the mag catch would…catch.
You can measure from the top face down to the top edge of the catch hole on a stock mag and use those measurements.
I’ve personally never needed to do it but I know a few here actually have but that’s my understanding of what it entails.
Cyma do have a different catch compared to a standard gen8, just to be difficult, still leagues better than Well though.
Can you give me an example drawing? I still don’t really understand the whole dremeling thing.
At work atm but…
This is a cyma mag
And this is a JinMing mag, Gen8 standard
See how the cutout on the top right is at different heights. Basically to get the mag to fit in the other blaster you’d need to cut the corresponding hole into the mag.
Some mags like this other JinMing gen8 have both cutouts…
The next issue is the fitment in the mag well itself, not all mags are the same dimensions length X width, example my LDT mags don’t fit my SLR or are a very tight fit just cause they’re a tad thicker.
Also, from memory the polarity of the mag contacts was reversed on cyma compared to gen8, unless they changed that.
Very ambitious project for a beginner, I admire your tenacity sir 
An update to this: I found out that my CYMA M4 mag is 2cm wide inside, and also the area near the contact plates are about 1.5cm wide. So should I buy a 1.5cm wide spring then cutting the bottom part or try to cut the top magazine with interfering the gel release button (basically cutting the mag and only leaving the top part then superglueing it to the mag shell).
Well the green will retain the stopper, that little pin sticking out that stops gels falling out when not in a blaster. In saying that, it probably won’t work or feed properly anyway, Azraels Armoury had tried to develop a mag like that with no success, even after putting quite a bit of money into it too from what I hear.
If you’re set on spring powered mags something like what they use for gbb is really your only option currently, a single tube with a long spring and a follower.
I haven’t bought any new parts for this project yet. I’ve done designing the cutouts for the magazine. The design leaves about 3-5 gel balls still in the mag tho.
