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Cyma sig 556 •PICS UP!

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Old January 16th, 2010, 21:02   #1
etd
 
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Cyma sig 556 •PICS UP!

Pictures will be posted within the next 24 hours as well as an update on th air leak factor.

edit• I have identified the air leak sources after swapping out parts one at a time. The piston head is 90% of the airleak and the air-nozzle completes the leak. Swapping both of these parts out results in a very tight air seal. Also the cylinder is incorrectly ported. Picks up tomorrow I have been busy. I have found the reason the selector switches came loose. I over torques them so the issue no longer applies.

*PICS UP!*
http://img96.imageshack.us/slideshow...icture066f.jpg

Cyma has long had a bad reputation for cheap low quality airsoft guns. With their new lineup of aegs they have clearly made the right steps to change this assumption.

At first glance the outer metal body looks pristine. The metal buffer tube and front set mesh well together when coupled with the butt stock. The cyma 556 sports a sleek rear flip up sight which is PERFECTLY line up with the front sight. That last comment needs to be fully explained to be appreciated. While looking down the pin whole of the rear sight the only object visible to your eyes focus is the circular front sight. A well crafted outer barrel feels solid along with the 14mm ccw flash hinder. There is no wobble present at all. The lines of the gun can only be described as godly when you take a close look at the meeting section of the upper and lower receiver.

I must say the texture of the metal body is extremely satisfying and the pistol grip is built like a rock. The magwell holds the stock hicaps with ease and they feed surprising well. I actually jumped on one of the high cap mags to see if it would break (I planned on buying mid caps anyways) and I was stunned to see no damage at all caused by my 180lbs body. The only complaint, exterior wise, is that the ambidextrous selector swith is very loose on the right side. It can't be fixed on my aeg anyways as it seems to bE a defect upon closer inspection. On a side note I find it hard yo reach the mag release as it's positioned too far forward and you actually have to put the gun down to reach it in my case ( I am 5'11)

Now onto the internals. The cyma 556 sports a classically crappy stock battery, motor and charger. While as a massive bonus the wiring, switch assembly and motor mounts are far better than what I've sen from cyma in the past. The custom (yes custom - don't plan on replacing this mechbox anytime soon) is rock solid with an amazing feel to it. The custom selector plate is also really nice and moves extremely easily. The gears have been a complete shock to me. I would have to say unless you plan on moving yo high speed or high torque applications keep them! They appear to be perfectly machined and I put them into another aeg that rubs at 30 rounds per second at 385 fps and they held up well. The upper mechbox is where the standard cyma rep kicks in. Plastic spring guide, plastic piston (all ready showing wear after only 400), terribly poor piston head and cylinder head. It also seems that cyma designed a new air nozzle specifically for the 556. All three previous sig 55x nozzle don't match along with a standard m4. The bad news here folks is the cylinder, cylinder head and piston head all air leak badly. The tappet plate is way to flexible as well. I almost forgot, the mechbox has very well crafted screws and tight threading and sports 7mm metal oil channeled bushings.

Now to clear things up the hop-up is basically a sig series hopup in cased in a box which redirects the bbs to allow standard m4 mag compatibility. The hop-up rubber is very good as well as the nub. Is tempered enough to handle 400fps plus. A major flaw in the manufacturing will cause some headchs though (confirmed this issue on Google). The inner barrel is 363mm and it's straight on the outside but the inside is a mess. Plan on having bbs flying a little to the left. Truth be told I don't know a single player who hasn't moved to something along the lines of a 6.03mm barrel anyways.

Summary: (buy this gun for the external qualities alone)
externals 10/10
internals 5/10 (amazing gearbox shell,hop-up, gears and 7mm metal bushings)

recommended upgrades & changes:
battery, charger, motor, cylinder, piston, piston head, cylinder head, spring guide & tappet plate.
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Last edited by etd; January 21st, 2010 at 12:18.. Reason: Fixed typos
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Old February 12th, 2010, 23:21   #2
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Thanks for posting the review. I have been looking at this AEG for a while specifically for the looks and you provided some great info. Thanks for taking the time to review it.
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Old February 12th, 2010, 23:57   #3
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I also have the same gun. This isnt Cyma, its JP brand, which could be a Cyma rebrand, but on the box it says JP. Just thought to clear that up

My opinion of the externals is 9/10 as well. VERY SOLID, my only issue is the stock. The stock threads isnt anything normal, they decided to make their own I guess, the week coming up, im goign to get the threads identified and post them up later. But I can comfirm that they are NOT the same ones used as AEG or GBBR m4's

My gun is shooting 380fps with .2g bbs
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Old February 13th, 2010, 09:03   #4
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My box, mech box and instruction manual state cyma. To my knowledge jp, cyma and King arms all make sig 556s. Unfortunately I don't own any m4 type stocks so I can't verify if it's a jp only issue.
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Last edited by etd; February 13th, 2010 at 09:06..
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Old February 13th, 2010, 20:41   #5
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I was at section8 the other day and looked at the cyma sig 556 and found it had no flip up sights as well. The store only stocks the cyma 556 so I am thinking last years stock? etd, does your box got a date on it or in the manual?
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Old February 13th, 2010, 23:42   #6
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Quote:
Originally Posted by Con Murder View Post
I was at section8 the other day and looked at the cyma sig 556 and found it had no flip up sights as well. The store only stocks the cyma 556 so I am thinking last years stock? etd, does your box got a date on it or in the manual?
You sure it had no flip up sights? When the rear sight is down it lays flat with the rail.
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Old February 14th, 2010, 06:38   #7
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I don't see a date anywhere. The flip up sight is also very hard to see in pictures as it's almost streamlined.
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Old February 14th, 2010, 15:59   #8
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No I held it and there was no rear sight at all. They had an optic on it for show but it was forward enough for me to see. Also the plastic front grip was really strange/difficult to get in compared to my 552 but most likely I was just unfamiliar with it.

I didn't get a good look at the box though. Could you put up a pic of the box? Really thinking I held 08/09 stock.
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Old February 14th, 2010, 16:18   #9
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Pretty sure it would have had a rear sight. You probably just didn't notice it.
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Old February 14th, 2010, 16:27   #10
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Okay then, I go in every once in a while so maybe I'll double check. I'll take a look at the box it comes in as well.
I very well could be mistaken.
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Old April 23rd, 2010, 16:36   #11
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Quote:
Originally Posted by etd View Post
My box, mech box and instruction manual state cyma. To my knowledge jp, cyma and King arms all make sig 556s. Unfortunately I don't own any m4 type stocks so I can't verify if it's a jp only issue.
Sorry for the slight necro.

All three make their own SiG556s. King Arms obviously makes their own, it's easily the most expensive one. CYMA also manufactures a SiG556, from what I understand, it is also in co-operation with CyberGun and is the second most expensive of the three. JP also manufactures it's own SiG556, and it is the cheapest of the three.

From what I understand, JP sells their SiG 556 with a standard STANAG mag, where-as CYMA sells theirs with a Thermold mag. Also from what I've gathered, JP's metal body is made of aluminum, where-as CYMAs is made of something else. Haven't been able to identify what CYMA is using for their metal body. As well, apparently JP's metal body is a little bit different from both CYMA and King Arms, and the trigger guard is also different.
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