SIG 552 Info

[Con Murder]

Hey I got a cybergun SIG 552 commando about 8 months ago and now would like to pull it apart and tinker abit. Anyone know if there is a tutorial? Video would help most, I'm a visual learner... And does anyone know its stock specs? Metal bushings? Hop up upgrades and TBB on my list anything else to improve its efficiency in the nozzle seel or something? I don't want a new spring or motor yet not until its needed. Also wondering if its a long or short piston and how much a few inches on the inner barell would effect its performance.
Thanks guys, any info would aid me biased or not.

[Con Murder]

Oh ya I forgot, can I replace the orange flash guard? Is it threaded at the end?

[Huron]

For the flash hider, it does come off, and the barrel is threaded 14mm CCW. That means you have to twist the flash hider clockwise to loosen it (facing the muzzle). It's a bitch to get it off of that model though, at least my brother's was.

[shadow_matter]

This is the link I used as a learning tool for disassembly. 552 upgrades are time consuming to say the least.

http://www.858airsoft.com/howtos/sig552disam.html

[Rotting]

Originally Posted by Con Murder

Hey I got a cybergun SIG 552 commando about 8 months ago and now would like to pull it apart and tinker abit. Anyone know if there is a tutorial? Video would help most, I'm a visual learner... And does anyone know its stock specs? Metal bushings? Hop up upgrades and TBB on my list anything else to improve its efficiency in the nozzle seel or something? I don't want a new spring or motor yet not until its needed. Also wondering if its a long or short piston and how much a few inches on the inner barell would effect its performance.
Thanks guys, any info would aid me biased or not.

First, just to quote another guy, he said the orange tip was a bitch for his brother. Was for me too on my Cybergun 552. Got it off with some vice grips finally after trying with my teeth unsuccessfully. But yea, you can replace it with any 14mm CCW flash hider/silencer, or a 14mm CW given you have the adapter to do so.

The only tutorial I've come across is the one that was posted. Seems to be the only one out there. The first time you do it, you'll probably get frustrated, unless you're patient (I am not patient with minor details).

For stock specs, I had mine shooting roughly 350-360FPS out of the box. It drastically requires rehaul though. Everything is plastic. Nozzle, piston, piston head, bushings, shims, everything. If you're a first time mechbox worker, I suggest bringing it to a local smith and requesting to watch him do it. That's how I learned. I've heard that apparently the Cybergun mechbox is a 7mm reinforced mechbox, but I've also been told it's just a standard 6mm mechbox. I'd need someone else to nay or yay that one for me.

As for upgrades, the hop-up in it is probably better off in there. From personal experience, I purchased a G3 full-metal hop-up (There is no SiG series enhanced hop-up, but the G3 does confirmed fit inside with a little bit of modification, minus the extra screw that holds the plate in the magwell) and I've had nothing but problems since. Once I finally get off my ass and unsolder the motor again, I'm putting the stock hop-up in there. The bucking sleeve I'd suggest replacing, just simply because personally mine was thin like tissue paper, and I didn't really trust it, heh.

As for barrel upgrades, I'm personally upgrading to a 455mm barrel because to me, the Sig 552 was at a loss for accuracy due to the 247/248mm barrel. I've heard other people saying that a barrel upgrade in a SiG 552 made a world of difference. Just make sure if you increase your barrel length, that you get the porperly ported cylinder.

Depending how large your budget is, invest in a HurricanE metal body, or invest in a new plastic reciever set. The rear of the stock plastic lower reciever seemed to have a tendency to crack right behind where the screw is holding the stock in place. My body cracked, as well as a friend's. If you can find someone parting out a JG or TM SiG 552, jump on it. Also I'd be cautious of how much stress you put on the pistol grip. I've seen people throw their gun (M4, AUG, AK) to the ground like it's made of rubber and it'll bounce and the grip is solid like a rock. When mine hit the ground, and the ground was covered in snow, it cracked like an egg, albeit my body weight also was on it. They're hard to come across, since most international and national retailers don't carry them.

Also, the sling it comes with is trash. For the love of God, don't use it. I nearly lost my gun in a river because the damned sling snapped.

Out of box performance? I'd say it's a good starter gun, with a lot of potential upgrade ability. A lot of people often overlook the SiG 552 because it's not a mainstream weapon, and at times can be more expensive than upgrading say an M4 or AK. I wouldn't get discouraged, though. It's a very aethstically pleasing gun, especially if you manage to get the 43rd magazines, and can compete with more popular model weapons given the time and effort put forth to compete.

[Buzzrexx]

If you do anything, shim the gears!

The 552 can also be a bitch to take apart (rather to put back together) as the selector gears on the lower receiver need to be in the precise position. with the plastic receiver, it is possible to fold the sides out of the way to pull the trigger/handgrip/mechbox assembly out. Just be careful.

Mine performed okay out of the box, except that the hopup was shit. I fixed that by changing just the rubber and bucking.

I gamed it in cold weather and blew up the piston, so then I completely re did the whole mechbox, and barrel.

I made my barrel extend just up to the end of the flash hider; you could also put on a supressor and go way longer. But just like Roko said, make sure you get a matching ported cylinder when changing the length of the barrel.

put in a Prometheus M100 spring, also a new air nozzle. Shoots consistent 350 and bang on target every time, too.

[Con Murder]

Thanks dudes. Really was wondering about the 6mm or 7mm mechbox. Now that I know it needs complete overhaul I think its Priority number one. But how much better is the Jing Gong? I can find one... Is it worth grabbing that instead of upgrading?

By the way, I love the SIG and will not put it down even though I got a JG M4S! haha!

[Con Murder]

Oh ya I worked on my M4 gearbox fine. I also work on guitars, amps and effects pedals so I am not afraid or impatient. The m4 had the but plate to tight (most likely from shipping it, DAMN CANADA POST!) but I took the whole thing apart in search of stripped teath anywhere! haha
Looking forward to making all my M4 friends fear the Swiss!

Roko, thanks for taking a half hour to write up some help for me... What are the 43rd magazines? I know the mags link up but 43 linked... together? Explain a little.

[Buzzrexx]

Originally Posted by Con Murder

Roko, thanks for taking a half hour to write up some help for me... What are the 43rd magazines? I know the mags link up but 43 linked... together? Explain a little.

The 43 round magazines are the real-caps for this gun. They are translucent, and have fake bullets in them, like a P90 or G36 mag. So they are needless to say, hard to get in Canada, but look totally cool.

[Rotting]

Originally Posted by Con Murder

Oh ya I worked on my M4 gearbox fine. I also work on guitars, amps and effects pedals so I am not afraid or impatient. The m4 had the but plate to tight (most likely from shipping it, DAMN CANADA POST!) but I took the whole thing apart in search of stripped teath anywhere! haha
Looking forward to making all my M4 friends fear the Swiss!

Roko, thanks for taking a half hour to write up some help for me... What are the 43rd magazines? I know the mags link up but 43 linked... together? Explain a little.

These are the 43rd magazines.
http://www.wgcshop.com/pcart/shopper...rch_43%20round

They definitely make the 100rd look like crap (the 100rd mags do not have fake rounds in them), but the problem lies that this is a restricted item, so in other words don't try to import it them yourself, it will most likely be seized at customs. If you want to order a couple 43rd SiG Series magazines, I believe you can custom-order them from http:\\www.airsoftparts.ca easily.

Saying these are hard to find is a vast understatement. The G36 and P90 are a dime a dozen, and while we're on the topic of guns with mags that have fake rounds in them, the AUG as well. The SiG on the other hand (550/551/552) isn't as popular, and as a result, less people have the mags for it, even the 100rd magazines. But, rest assured, if you do manage to purchase some 43rd magazines, they are head turners. The SiG series 43rd mags are very clear, and you can see the fake rounds very well, where-as the G36, P90, and AUG all seem to have quite a bit of tint to them. However if you plan to paint your gun to match a certain camo, I'd say just ge tthe 100rd mags. They're cheaper by the pack, and you can also paint them to make your gun. I wouldn't recommend the 43rd mags with a camo-painted gun. It just didn't look right to me. Also, they're a pretty penny. Last time I got a quote from AirsoftParts, it was going to cost me roughly $240.00 for 4 43rd mags. I guess it depends how much you want them.

Also to answer your question, the Cybergun SiG 552 is a rebrand of a JG SiG 552. The JG is of higher quality, but most of the really expensive upgrades, or just the more expensive upgrades, are still going to be required regardless of model. Personally, since you already have the Cybergun SiG 552, I'd just stick with that and upgrade it. If you end up fully upgrading it, it won't matter which company made it.

[Buzzrexx]

Originally Posted by Roko

Also yo answer your question, the Cybergun SiG 552 is a rebrand of a JG SiG 552. The JG is of higher quality, but most of the really expensive upgrades, or just the more expensive upgrades, are still going to be required regardless of model. Personally, since you already have the Cybergun SiG 552, I'd just stick with that and upgrade it. If you end up fully upgrading it, it won't matter which company made it.

+1

...And if you do the right upgrades, you can stick a Lipo battery in it like i did, for beautiful response and ROF

[Con Murder]

Thanks buzz, I was really wondering how I would get my SIG to pull a strong spring. That battery compartment just has no room, or at least I can't figure out how a 9.6v would ever fit! I was considering making a custom battery that I would kind of wrap around and stuff... But I knew that was a bad idea.

At any rate I know I need a good charger made for them, is that all I need for Li-po? Oh a list of internals required as well for that upgrade.
Do you guys know the piston and cylinder needed, as I plan to extend my barrel (6.03) to M4 size under a silencer.
Last question, when I do the TBB should I do the piston, nozzle cylinder and hop up rubber all at once or can the piston and cylinder wait?

[Styrak]

Piston doesn't need to change (they're not gun-specific). Don't know if you'll need to change the cylinder. What's your barrel length right now?

[Rotting]

Originally Posted by Con Murder

Thanks buzz, I was really wondering how I would get my SIG to pull a strong spring. That battery compartment just has no room, or at least I can't figure out how a 9.6v would ever fit! I was considering making a custom battery that I would kind of wrap around and stuff... But I knew that was a bad idea.

At any rate I know I need a good charger made for them, is that all I need for Li-po? Oh a list of internals required as well for that upgrade.
Do you guys know the piston and cylinder needed, as I plan to extend my barrel (6.03) to M4 size under a silencer.
Last question, when I do the TBB should I do the piston, nozzle cylinder and hop up rubber all at once or can the piston and cylinder wait?

If I remember right, a M4 barrel is 363mm. When you do that upgrade, you also should upgrade the cylinder. The SiG's default barrel is only 247mm/248mm long, and uses a Type-2 ported cylinder. With a 363mm, you should match the cylinder with a Type-1 ported cylinder.

EDIT: Also, larger batteries in a SiG 552 can be accommodated for by one of two ways. The first is taking out the battery holder inside the hand guards (There are 5 screws that hold it in place, and they are easily accessed). This does expose the inner barrel a bit, but not to the point where the battery would damage it. Commonly this is done to make way for a 9.6v battery pack. The other option is an external battery pack. A lot of people use an external battery pack in the shape of a PEQ III (or was it II?), and this way they can hold a 11v li-po battery in there. Personally, when I upgrade to a larger battery, I will end up going for the PEQ battery pack. With no battery in the handguards, I now have more than enough room for a MOSFET setup. Since the SiG552 is a fairly packed gun, it would be a bit difficult to fit a MOSFET in any other place.

[Buzzrexx]

here's my setup on my Sig 552:

-DeepFire titanium tooth piston (I put in good quality metal piston, piston head, and cylinder head with the sorbo pad in order to handle the speed and shock of the Lipo battery. Otherwise it will wear out very quiclky.)
-Modify aluminum piston head
-Modify aluminum cylinder head
-Sorbo Pad
-Prometheus M100 spring
-Modify air seal nozzle
-Shim kit (VERY IMPORTANT!!)
-Modify double-groove stainless bushings
-Mechbox lubed up good with Super Lube
-new Hop up rubber & bucking
-Madbull tightbore barrel
-11.1V Lipo battery (fits beautifully in the battery compartment; you will need a Lipo specific charger for the battery; Huang has them for a decent price.)
-custom made metal upper rail


(please excuse the colouring- came through kind of funny on the photo)

Also note- when putting the gun back together, don't overlook the need to properly adjust the motor depth. If the mechbox is properly shimmed, it will sound smooth, but you will need the motor gear to properly mesh for this. First make sure the gun fires and the motor is not grinding at all. Then slowly move in or our with the adjusting screw, and fire shots in semi. You are looking for the spot where you don't hear any gear turning sounds, only a SNAP. Or the closest thing to it.