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Reinforced Gearbox

9010 Views 44 Replies 11 Participants Last post by  shadowbot
Ok guys, lets hear what everyone thinks about this one...

As everyone knows, and one has felt ;), I have my CA SPR that I just got. I really love this rifle!! I ended up using it more than my CA M24 today during a game.

I have done a little to the rifle, but nothing major or anything in regards to the gear box. I have stabilized the inner barrel, and am planning on on stabilizing the outer barrel inside of the tube as well. That will be apart of the winter projects that I am going to do.

So this is my question to you guys......

Has anyone got a systema gear box in there rifle, and how does it perform? I am planning on getting this rifle to 500-550 fps, so that would be the gearbox with the M150 spring. I am trying to find if the gears are the high torque, and need to find a motor that will work.

I know there are a few different gear boxes at the moment.
There is the Systema Complete gear box, the Revolution, as well as the Systema Energy.

So here is my question to you guys.......

1. Which one of the above would be the better choice?
2. Which one will last the longest?
3. What type of motor would be needed?
4. Would I be able to use a 7.4 v lipo in them and have no problems?
5. I would obviously use Duttons semi auto only mod to her, so no worries there.

I know the revolution gear box is awesome! I have found it in a few places, but have heard that you need the Systema hop chamber to use it. But the one good thing about it is that it comes with the motor, and a mosfett. Now this is on the high side of range, but I can eat Ra-man noodles for a while to get her bought.

If there are any other gearboxes that you guys can suggest, let me know. I would also like to hear anything you guys can tell me about the Matrix 8mm gearbox. Of course in the same FPS as the systema.

I would like this rifle to be done by spring next year. So I can use the rifle at my large game.

Thanks in advance guys, and I can't wait to see what you guys come up with.
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Hi guys!

In my experience, CA can hold their ground against strong springs. I'm running a SP170 in mine for 9 months straight. No signs of wear and tear so far. If you're really insisting in changing the gearbox shell, try Deepfire. Though very durable, some find Deepfire's gearbox annoying since you have to sand down the shell in order to fit other parts. I find it a "pro" since the parts can be aligned properly. Cheers and goodluck on your project!
Thanks for the clear up Dutton.

I am leaning towards building a gearbox myself. Would be alot more fun, and will give me something to do durring the winter months.

Keep all the great info coming guys!

Thanks again
Woogie, I'm gonna invite you over to ASM. There are wealths of AEG knowledge on there. One of my buddies has ran 700fps at 35rps with an AEG, and pushed 70rps @ 350fps. Yeah, he's that hardcore. I would personally never go with a premade box as there overly expensive and you have to open it up and redo everything once you get it. Dutton, I have to disagree with you on the Systema Magnum, they are giant pieces of poo-poo. If you wan't links let me know. If you get a Tirador Sorbo kit like I recommended, you could push an M150 on full auto with an aluminum piston head or so I've heard. I will warn you though, that you will never experience the same accuracy you had with any of your rifles, and that if you can afford it, I'd personallly go with a 400fps build and tune it to hit 200' so you can still spray on auto
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metallicafatcat said:
Dutton, I have to disagree with you on the Systema Magnum, they are giant pieces of poo-poo. If you wan't links let me know.
I'm not arguing that it's the greatest motor on the market. I simply stated that is was a decent motor choice. Also, I'm speaking from personal experience with the motor, not something I read on the internet. I've had a Magnum in my SR16 since they came out several years ago (in addition to teammates and 1 other of my guns having them - my SR16 just has the oldest standing Magnum in it), with the only notable problems being the pinion gear - which is designed to strip as opposed to stripping a $90+ gearset - and it eating through brushes.

In addition, I also have 2 PTWs myself, another one I had previously, another 2 my brother has, plus I'm the team gunsmith for several other PTWs. Now normally this wouldn't be an important fact, except for the fact that the Magnum motor was designed based off the 480 motors that the PTW uses (not the 490 garbage that the new PTWs use).

I'm well aware they have their problems, but find me ANY electronic component in ANY industry that doesn't have its flaws and I'll award you with a +1.
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Ok I see where your coming from, but if you must insist EF Fet's are pretty rock solid along with the Teinly Motors ;) Not to stretch it further, but I wouldn't even consider the magnum.

Thanks for that guys! I really enjoy reading when people show there "proof" so to say. It not only makes for a good read, but you get to see both sides of the situation.

Yeah I am going to go with a build. Going to slowly buy the components and go from there.

So now here is my next question...... I just sold my SCUBA tank and I have $200 sitting in my paypal account, as well as another $80 in my account that I can use for the build. So what way should I go?

Should I save up a little more, by the sale of the M24 to get a revolution, or should I get the parts and then build it up when I can.

So what way should I go?
Use stock gearbox, and upgrade other parts, or what....
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What gearbox are you starting out with? Or building strait from the ground up? If you start with a gearbox, put a stronger spring in it, shim and lube it good, and practice all of the Vindi mods on it. That way, when you buy the more expensive parts, and mod them, (with the Vindi guide) youll have practice first.

I would buy a aftermarket box, somthing fairly cheap. (i.e. that fancy-looking matrix one from Evike?) Upgrade the spring, and mod it, that way you can also see how well it lasts stock, (with a stronger spring), then, replace parts as they break. Becasue from what it sounds like, eventually youll be replacing 100% of the mechbox.
Woogie, first thing you should do is get a new box. The reason is that if I'm not mistaken, the box in the CA has gear reinforcements which makes it difficult to use torque-up gears. I'd personally look at a G&P or a Bravo for a box if they're compatable. This way, you will modify your parts to the gearbox and not vice versa. Get some high quality bushings. Kanzens are too weak from what I'm told and have seen. I like the Modify Tempered SS bushings. Then go with the gears. Here's how I look at the gear situation. Go cheap enough that if they fail, you can replace them, or go high end and so you don't have to replace them, ie: SeigeTek Concepts. Then, move to the electrical parts of your gearbox, as all of this does no good if you put it together and then realise you forgot to connect something, or there is a lot of resistance. Wiring is a pretty conformed concept as a Fet, Deans, and 16 AGW or bigger wiring. I will say though don't get a Systema box as, eventually you'll have to replace the gears, piston, and piston head, and other bits and pieces in them. The motor is really up to you, but a JG M42 or M93 motor will do you all you need and their normally availible for less than fifty USD. Meh, I need to stop procrastinating my homework.
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LOL ....

Thanks man, will have to see what happens here the next few days. Going to need some funds to fix some things around the house here. So this rifle may be sold a well.....but we shal see.
Yeah I would be willing to do that for the rifle..... just not the car ;)
*** GOOD NEWS ****

Build is back on!!!!!

Hey woogie. So i skimmed through this thread and from what i get your looking to build an aeg gearbox from the ground up? If thats correct what version are you looking at using as a platform?
If you read through the thread you should know it's some sort of V2.
Alright, thank you metalcat. Sorry i must have skimmed over it. If you want a high powered setup woogie, in my opinion, v2 is the wrong way to go. From what ive experienced/read/heard they are the most prone to break out of their shells. I ignored that fact and have had decent luck so far with version 2 but i am only running a m130 in my dmr. If your set on v2, i dont blame you haha.

As for a decent gearbox to start with, I'd recommend the matrix drop in gearboxes on evike. I purchased this one as my base platform.
Just make sure you open it up and grease/ shim it properly, it comes almost dry. I was content with the m130 for te time being so i dropped in a boreup kit, and magnum motor ( also the matrix brand). The motor has honestly blown me away. Overall the gearbox has held up well and I was very impressed with what i recieved for the price of it. I may drop in a m135 or even a m150 if i get ballsy. Well see. So good luck and I hope this helps.
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No problem rag, don't worry about it.

But I just partially sold my M700, so when that sale goes through I should have enough, with those funds and those in my paypal, to get everything that I need for the build.

So that is good news. Now just need to get it figured as to what I want to get. So much good news on here, that I need to go over it all and do some major thinking.

Thanks to all who have input and all the help... And don't' stop giving it
Need all I can get!
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And what am I to look at on that site ;)
Mainly at the Sorbo stuff, though they do have access to anything from TM if you may need it. Plus they'll find things that they don't have for you.
OK well this is what I have now guys.....

I have gotten a Systema M130 spring from a fellow member here on the site. So I have taken apart the rifle for a good going over and over all clean up.

The motor is a CA High Torque motor, the piston is completely polycarb, wiring and everything else looks to be very nice. The gears have CA GEARSET stamped on them.

Now I was digging through my junk drawer and I found a spare cylinder in there. Though this cylinder has elongated holes in it?
What is the point of this cylinder? and would it be good to use in this build?

And should I be looking at getting a full metal piston?
Full tooth rack on the piston or half tooth?
And what are the pros and cons of this?

I am just wondering now how long this piston will last with the stronger spring in her.
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