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King Arms
Approx FPS 380+
Approx Range 60m+
Barrel Length 255mm
Magazine Capacity 135rd
Battery Type Mini
Battery Connector Mini Tamiya
Shooting Mode Semi / Fully Automatic
Blowback Yes
Hop Up Adjustable
Gun Type Electric
Gearbox Style Version III
Manufacturer King Arms
Weight (Kg) 3.5000

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King Arms SIG SAUER 556 Shorty Airsoft Rifle AEG with Blowback!

- (King Arms)

Usually Ships: From Our Warehouse Within 24 Hours
*Estimates exclude weekends & are subject to change*

Extremely high quality M4 based airsoft rifle from King Arms with solid aluminium and fully trademarked receiver which will accept standard M4 magazines.

Version 3 steel-geared engine and full metal sealed hop unit. Brilliant quality and performance.


Supplied with a 135rd M4 style magazine!!!

- Full metal receiver and RAS rail system
- Fully licensed SIG Trademarks
- Nylon fibre pistol grip and stock
- Reinforced Full Metal 7mm gearbox
- Realistic Electric Blowback System (EBS)
- Flip-up front and rear sights
- Flat top-rail for easy scope/sight mounting
- 4 Position retractable HOLO Stock with metal buffer tube

Availability:In Stock

WAS: £249.95

NOW: £174.95

King Arms SIG SAUER 556 Shorty Airsoft Rifle AEG with Blowback!

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WAS: £249.95

NOW: £174.95


The SIG 556 is used by Military, SWAT, and private contractors around the world. The 556 Shorty is a compact powerhouse. The receiver is completely metal with fully licensed SIG ARMS trademarks. The gun also features an anodized CNC front rail system and High Strength Nylon Fibre stock and motor grip.

Compatible Batteries With This Model

Ultra Thin LiPo7.4v 1300mAh 2Leg
Stick LiPo7.4v 1300mAh

Customer Reviews

King Arms SIG SAUER 556 Shorty Airsoft Rifle AEG with Blowback!
Decent mid range gun with much potentialReview by
I have had this gun for a month or so now and i have given it a full day's skirmish and given it a strip down I am comfortable to do a proper review rather than one of those useless "I just unboxed it and it looks good" reviews that I see all to often.

Lets start with aesthetics, the externals are all top notch and solid, the majority of it being metal except the grip and stock. the Sig Sauer trades are all stamped into the receivers. I wish I could upload a picture of how I have kitted it out accessory wise. Speaking of accessories, I had some trouble installing my AFG on the bottom rail due to a rounded lug that holds the lower hand guard in place, however this is removable if you so desire without the hand guard becoming loose, the second thing i would recommend would be a decent RDS/scope, the reason for this is the iron sights are not the best. Lastly, I found that it can accept most aftermarket sling plates (mine is now fitted with an ASAP style sling plate) I mention this as the sling points out of the box are not fantastic

Next subject is how it shoots and feels. It has a nice smooth trigger pull and the ambi fire selector has a nice defined click when it is in place, the fire selector is only marked S and F due to it being a replica of a civilian firearm but i can assure you it has good rate of fire in full auto on a 7.4V lipo. It is quite a heavy gun weighing in at 3.5 KG (not including accessories) and is well balanced with the center of gravity being around the mag-well (side note it is so well balanced that it can free stand on the stock) The mechanical blowback (piston operated) gives the gun a nice loud and distinctive clacking noise. the hop is a bit of a pain to adjust due to where it is seated and the fact that the mock bolt does not lock back. however, I was managing an effective range of 40m using biosphere .25s and standard internals which is more than enough for my style of play.

Internals are mixed. the plastics that King Arms use in their gearboxes are not the best noteably the tappet plate and trigger unit, It does the job, but its not the best. The gears are average out of the box quality, as is the piston assembly. motor is of decent quality too everything is pretty much a standard V3 design. The last thing i will say about the internals is I wold ABSOLUTELY recommend one of the spring downgrade options especially if you are uncomfortable with internal work. First thing I usually do is chrono, out of the box this gun came in at 380fps +/- 5fps

The last thing is mag compatibility. The gun comes with one mid-cap however the lovely folks at Airsoft world threw in a free hi-cap, the free mag was a standard M4 hi-cap it was a tight fit but it fed well. I have tried various other mags the ones i have found to have the best fit and feed are the KA mag from the box (Duh), troy battle mags, lancer L5 AWM(?), magpul/PTS Pmags and Emags (both the hi-cap and mid-cap versions of each) as for the cheaper Chinese clone mags its 50/50 if they fit and/or feed

In summary, this is a good mid range gun out of the box I would say on par with a G&G toptech in terms of aesthetic quality but not quite performance, over all a decent mid range starter/ back up and if you are that way inclined, it would be a good base for a high end build.

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Any figures used are based on tests performed on the products when they are first listed. These can vary due to changes by the manufacturer, gas pressure, gas used and a number of other factors. All figures should be treated as an approximate guide and used for reference only. 

All listed FPS are +/- 5% due to differences from rifle to rifle. If you require a guaranteed FPS, please add an upgrade/downgrade option on to your product (this may cost extra).

All images, product contents and specifications listed are based on checks performed when a product is first listed and may differ due to changes over time made by the manufacturer. This includes package contents in regards to any 'extras' provided e.g. Sample BBs.

We cannot offer an exchange on pyrotechnic devices due to device failure. We are unable to guarantee that the pyrotechnic device has been stored in a moisture free environment or used correctly in accordance with the manufacturers guidelines.

Unless otherwise stated, all products are sold singly.

No airsoft AEG is warrantied for use with an 11.1v LiPo or higher voltage battery at UK velocities (373fps or lower) unless specifically recommended on the product itself. Use of higher voltage batteries can cause failures and will negate any warranty implied or otherwise.

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