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Sig Sauer 556 Metal Airsoft Rifle AEG

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$249.99  per EACH
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Item Code:
ERM-PS-SIG556
Guns Styles / Models:
Sig Sauer Airsoft Guns
Airsoft Manufacturers:
Soft Air Cyber Gun & Palco
Manufacturer Part No: 28926
Stock: Ships in 1 Week
Model: Sig 556 Airsoft AEG Rifle
 
Written Review  - Click on Picture of Airsoft Gun to Read Review Accuracy Proven - Click on Picture of Airsoft Gun for Target

Sig Sauer 556 Metal Airsoft Rifle AEG
Specifications:
- Velocity: 350 FPS (0.2 g BB) / Range 180- 210 Feet
- Barrel Length: 16 inches / 41 cm
- Magazine Capacity: 300 Rounds
Features:
- 2 Magazines Included
- Metal Receivers
- High Impact Plastic Foregrip Covers w/ RIS
- Rear Folding Sight
- M4 Style Magazine & Retractable Stock
- Battery and Charger Included (Small)

Please visit our Airsoft Maintenance page for information and videos.

Cyma/Cybergun SIG 556 AEG review

Table of Contents:
Introduction
Ordering
Basic Gun Information
First impressions/Packaging
Included
Gun Specifications
Externals
Trademarks
Magazines
Performance
Internals
Modifications
Pros/Cons
Overall

Introduction:
A few years ago, through a licensing agreement with Cybergun, Cyma had produced an airsoft SIG 556 AEG. There's not too much information out there about it, so today I'll be writing a review on this interesting Airsoft Electric Rifle or AEG. As I mentioned before, it has been available for a year or so, therefore it's not the newest model out there, but still is a pretty awesome Airsoft rifle, especially for the money! Keep reading for more information!

Ordering:
I obtained this Airsoft rifle through Airsplat, priced at $199.99. For that price, you get a skirmish ready full metal AEG with unique features for this type of Airsoft gun, including a retractable stock and the ability to use M4/16 magazines. It also includes a warranty against manufacturer defects, so you don't need to worry about getting a DOA Airsoft gun. The Airsoft gun arrived a few days after shipping using UPS Ground via Airsplat's free shipping option.

Basic Gun Information:
The SIG 556 is a rifle based on the 550/551/552 platform, with a few key changes. Normally, those rifles utilize a side folding stock as well as a proprietary magazine, but with the 556, a retractable M4 style stock is used as well as STANAG magazines, making the gun very easy to use if you already have a stockpile of AR mags. It also comes with a polymer railed handguard as well as a railed upper receiver for mounting optics. These make it very easy to modify and accessorize the gun to your liking.

First impressions/Packaging:
As with all Cybergun licensed guns, the Airsoft SIG 556 came in a nicely decorated full color box. Inside the box, a foam inner liner keeps the Airsoft gun safe during shipping, and the outer decorations highlight the Airsoft gun's performance figures. My first impression on pulling the Airsoft gun out of the box was realizing how heavy this thing is. For a midsized Airsoft rifle, this gun weighs a ton.

Included:
Along with the Airsoft gun itself, the package includes two hi-cap magazines, a stick type battery, trickle charger, cleaning/unjamming rod, and a basic manual.


Included stick battery

Gun Specifications:
Weight: 8.4 lbs
Length: 33.75" – 36.5"
Width: 2.75" at handguard
Height: 9"
Sight Radius: 18"
LOP: 11.25" - 14"

Externals:
This Airsoft gun is one of the more unique looking AEGs currently available, due to its mixture of elements from the normal SIG rifle series with AR features. It is a full metal replica, as the only components that aren't made of metal are the pistol grip, stock, and handguard. The parts that are polymer are made of a nylon polymer material that is extremely strong. The paint finish on the gun is matte black, giving it a very realistic appearance.


External overview, left side


Overview, right side

The stock is a GLR16 type unit, complete with inner compartment for storing batteries for your accessories. It has a rubber butt pad that can be pulled down out of the way to access the compartment. The stock tube is metal and is threaded into the adapter at the rear of the receiver. It's an oddly configured stock tube, with five adjustment positions, only four of which are easily accessed.


Stock retracted


Stock extended


Stock tube


Battery compartment

Moving forward, you'll hit the receiver, which is based on the traditional SIG 55X models and is quite narrow and relatively streamlined compared to traditional AR receivers. The lower receiver houses the majority of the fire controls with the upper housing the cocking handle and top rail.


Receiver, right side


Receiver, right side

One of the benefits of this platform is the ambidextrous selector switch, making the Airsoft gun easy to use by left or right handed shooters. The magazine release is an AR type unit that is located on the right side of the receiver. The only other functioning control is the bolt handle that can be pulled back exposing the hop-up adjuster.


Controls


Right sided controls


Cocking handle


Bolt pulled back

The pistol grip is a SAW type unit which is slightly oversized but very comfortable. There are large grooves on the sides to aid in keeping a solid grip on the gun. A screw at the bottom allows you to remove the grip to access the motor and remove the gearbox.


Pistol grip

Moving forward from the receiver, you'll hit the railed handguard that doubles as the battery housing. The rails are molded into the handguard and are not removable, however they are still relatively comfortable to hold without covers in place. The battery compartment is designed to fit an 8.4v stick pack, but you can fit a 9.6 or even 11.1v LiPo pack in there if you carefully position the wiring.


Handguard


Rail surfaces

Moving forward from the handguard, you'll hit the faux gas block and outer barrel. The outer barrel is made of metal and is terminated in a 14mm- threaded muzzle. It is equipped with a birdcage type flashhider with an orange plastic ring glued in place.


Outer barrel and gas block

Aiming the 556 is accomplished using the included iron sights that are adjustable for elevation but not windage. The front is a fixed unit with a flip up component that would normally house the night sight. The rear is a small unit that flips up from the top rail and can be adjusted for elevation. The railed upper receiver lets you mount optics if you so desire.


Front sight, large post


Small post


Rear sight folded


Rear sight flipped up


Top rail

Trademarks:
One of the benefits of the Cybergun licensing are the licensed trademarks sprinkled throughout the Airsoft gun. On the upper receiver you will find laser engraved markings indicating the manufacturer and model number. You will also find SiGARMS markings on the pistol grip, stock, as well as on the magazines.


Receiver markings


Grip


Stock


Magazines

Magazines:
The included magazines are specially designed hi-caps, made of plastic and with a unique locking design allowing you to stack them together. They hold about 350 rounds each, and the Airsoft gun includes two magazines. Due to the shallow magwell, you can fit pretty much any standard AR magazine in this thing, including Pmags and some drum mags.


Magazines


Feeding end


Winding wheel


Clipped together

Performance:
Performance after a 500 round break-in period, using Airsplat .20g BBs, shot through a Madbull Chronograph is as follows:

High FPS: 387.7 FPS
Low FPS: 382.4 FPS
Average FPS: 385.9 FPS

Rate of fire using the included 8.4v battery is fairly low, in the 15-16 RPS range. With a higher output battery, you'll see mid 20s, easily. The stock motor is a torque unit, but it does allow some speed with the right battery.

Range and accuracy are pretty good, largely thanks to the decent length of the inner barrel combined with the BAX hop-up system. With heavier weight ammo, Echo 1 .28g in my case, I was easily able to hit my torso sized target at 160' without issue. The hop-up is pretty responsive and holds its selected position really well.

Internals:
Now to the biggest issue with the SIG platform - ease of access to the internals. The narrow receiver makes it damn near impossible to access the gearbox without a LOT of SIG specific experience. The space constraints involved with fitting a gear driven ambidextrous selector system take its toll on accessibility. In fact, when they build these, they place the two halves of the receivers together around the gearbox and then permanently attach them. So, if you need to open up the gearbox of this thing, I hate to say it, but either have a spare body handy, as you may break the factory one, or take it to your local shop.

That being said, I'll explain the guts of this Airsoft rifle as best as I can with what I have in front of me. The inner barrel is approximately AK length, and the barrel can be accessed with relative ease, only requiring the removal of four screws at the front of the receiver. This will allow the entire front assembly to slide out and off the Airsoft gun. You can then pull the inner barrel out of the hop-up if you want to swap it out with a tightbore. The hop-up bucking uses a split nub design to give more consistent application of pressure to the BB. Part of the hop-up system is the long feed tube required with using AR mags in a SIG gun, and as a result, you lose about 10 BBs of capacity from your mag.

Further disassembly entails removing the two screws at the rear of the receiver as well as removing the pistol grip. You can then separate the upper and lower halves, letting you access the gearbox somewhat. The issue with removing the gearbox lies with the design of the selector assembly. In order to pull the gearbox out of the receiver, you have to pry the lower section of the receiver away from the selector switch assembly in order to clear it. With a plastic bodied SIG, this is tricky, but still possible. With the metal body, especially a potmetal body like this, I bent it as far as I felt comfortable without cracking the receiver and still couldn't get the gearbox out. It's just a bad design, but it comes with the SIG territory. You can see the split in the clamshell receiver design where they literally build the gun around the gearbox, instead of just placing the gearbox inside once the body was built.


Gearbox in lower receiver


Steel bushings, close-up of motor half cage

That being said, I can tell you that the Airsoft gun uses a non-ported brass cylinder, steel bushings and gears, a V3 gearbox with cutout for a blowback system (but no blowback system itself), a polymer spring guide, and a polymer piston with ventilated head. A peek inside shows minimal lubrication, but I cannot comment on the shimming aside from saying that it sounds pretty good while shooting. Unfortunately, I don't feel comfortable diving deeper into the box to check air-seal, but I imagine that it's pretty good, especially considering the FPS consistency that I saw in my performance testing.

Modifications:
As far as modifications go, you have many options due to the railed front end and M4 stock tube. You can swap out the stock with with different units, however, the Airsoft gun requires a real-steel type buffer tube so mounting some full/adjustable stock units may be tricky. In my case, I'm setting it up as a DMR, complete with CTR stock, long eye relief optic, folding bipod, and some upcoming internal upgrades.

Pros:
Full metal construction
Affordable price – Sub $200
Very skirmishable performance
Plenty of rails for accessories
Utilizes AR magazines
Adjustable stock fits most users
Realistic weight

Cons:
HEAVY
Limited to stick type batteries
Receiver paint finish is a little fragile
Long selector switch travel
Drops 10 or so BBs with every mag change
Gearbox is damn near impossible to remove without breaking the body

Overall:
I've always been a fan of SIG type rifles, however I was always put off by the required proprietary magazines, as well as the non-adjustable stock. The 556 alleviates those concerns by allowing the use of AR mags, of which I have dozens, as well as the use of a collapsable stock, letting me adjust it to fit to my liking. It gives you all the functionality of an M4, but with a vastly different look and feel. I really like it, and I think with some slight tweaks, it'll make a decent little DMR platform.

Review by Booligan

This airsoft gun is not to be misrepresented as a real firearm or gun that is manufactured by SigArms and is merely an airsoft gun that fires 6mm pellets. The manufacturer of this airsoft gun is JG.


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