Product code:
  • SIG SG 55x Series Weapon
  • GHK Precision Quality
  • Gas Blowback Rifle

Built by GHK this weapon is a gas blow back recreation of the SIG SG 553, a member of the SIG SG family, this rifle is of the highest quality, looking highly realistic and providing crisp recoil and kick thanks to the gas blow-back system.

Full description


This fantastic Airsoft replica is based on the real world SG 553, and as such features externals which match the materials on the real weapon.  Alloy receiver, rails, internals and outer barrel, with polymer magazine shell, stock, hand guard and pistol grip.

The gas blowback system is designed so that when the weapon is fired the bolt is moved backwards by the force, adding recoil to the weapon for a more realistic experience. Thanks to GHK's experience in building top quality gas rifles the recoil is satisfying, crisp and reliable.

The weapon features a top 20mm RIS / RAS rail for attaching sights and scopes and is the perfect spot for a red dot sight. The weapon also comes with a pair of short 20mm RIS / RAS rail sections which can be attached to either side of the hand-guard allowing for the attachment of torches, lasers and other side mounting accessories. The flash hider is also removable to reveal a 14mm CCW thread which allows the attachment of a variety of silencers and suppressors, and even tracer units.

The special features do not end with the weapon, the magazines are also feature GHK's hallmark quality. The magazines are gassed from the back and feature a larger gas well than most other gas magazines on the market, and are finished with a polymer shell which allows the magazines to be interlocked. The semi-transparent shell is more than for just looks, it allows you to see through the front of the magazine to the BB allowing you to count the amount of rounds you have remaining.

This rifle is perfect for those Airosft Skirmishers who are doing a Swiss army loadout, or for those who are looking for a gas blowback rifle that is reliable even in cooler temperatures, or for those who simply want a more unique looking weapon which is sleek and stylish.


  • Highest Quality built by GHK
  • Gas Blowback Assault Rifle
  • Highly efficient and reliable GHK gas system
  • Based on the real world Swiss SIG SG 55x series
  • Safe / Semi / Full Auto / Full Auto Fire select
  • High quality Polymers and Alloy
  • Top 21cm 20mm RIS / RAS rail for sights and scopes
  • Two side 6cm 20mm RIS / RAS rail for torches and lasers
  • Removable flash hider to reveal 14mm CCW Threaded Outer Barrel
  • Ambidextrous paddle style magazine release
  • Folding stock which locks securely closed and open
  • Rear, forward and stock sling loops
  • Removable charging handle for maintenance
  • Locking body pins, with push button release system
  • Textured pistol grip for extra hold on the weapon
  • Interlocking magazine for stacking
  • Adjustable radial hop-up unit for range and accuracy
  • Rubberised portion on the charging handle path to prevent dust and dirt from entering the receiver
  • Flip-Up front and rear iron-sight
  • You can see the BB through the front of the magazine when loaded to check the round count

Package Includes

  • SIG 553 GBBR Assault Rifle

Special Instructions

Please ensure when removing the body pins you press the release button on the opposite side. The button is designed to pull in the small tabs and release the pin, so attempting to push the pins out without pressing the button will damage the pin.

Due to the way the burst mechanism works we recommend that you do not use too powerful gas as this may cause the weapon to over-cycle and the weapon will go full auto in burst mode when the magazine is full. Our suggestion is that you use NUPROL 2.0 Gas or an equivalent.



Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 321fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Screwdriver Icon
Included Items
  • Magazine
  • Instruction Manual
  • 20mm RIS/RAS Rail Sections
Skill Level Icon
User Skill Level
Experienced Player


Colour Wheel Greyscale
Primary Colour
Colour Wheel Greyscale
Secondary Colour
Two Tone Icon
Pre Two-Toned
Construction Icon
Alloy receiver, rails, internals and outer barrel, with polymer magazine shell, stock, hand guard and pistol grip.
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Green Gas
Blowback Icon
Gas Blowback
Weapon Platform
SIG AR Series
Magazine Style Icon
Magazine Style
Sig Sauer Series
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Patrol Base | Burst
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Adjustable through charging handle window


Weapon Furniture Icon
  • Railed Handguard
  • Folding Stock
  • Railed Receiver
  • Integrated Sight
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Weapon Length Extended
Stock Positions
2 Position
Sight Type Icon
Sight Type
Aperture Iron Sight
Sling Plate Icon
Sling Options
Stock , Handguard , Loop , Receiver ,


Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CW (Clockwise)
Outer Barrel Thread Size

Magazine Specific

Magazine Type
Medium Capacity , Spring Loaded, Gas,
Magazine BB Capacity
Approx. 32 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Magazine Gas Fill Location
Magazine Gas Type
Green Gas

Gas Gun Specific

Gas Can Icon
Gas Compatability
Green Gas
Gas Can Icon
Gas Recommendation
Green Gas

Product Testing Data

Notepad Icon
Test Description
321fps @ 15.7°c, using NUPROL 2.0

Delivery & returns


1 - Deliveries
2 - Returns

1 - Deliveries

We are proud of our rapid delivery which, comprises of Royal Mail 1nd class recorded and courrier next working day to mainland UK. We also ship to EU countries; Scottish Highlands and Islands which are a minimum of a two day service and are shipped by land / sea. Our deliveries are made by DPD and Royal Mail recorded 1st or 2nd class signed for, and Royal Mail Standard.

We deliver from Monday to Friday, and Saturday with a special service. If more than 7 days have passed since we confirmed dispatch and your order has not arrived, then please call our Customer Care team on 01484 644709. If we don’t have stock of an item then we will call and email you letting you know that it is out of stock, and we will send it to you as soon as stock becomes available. If you want to cancel any item/s that are out of stock once order you can. For most UK deliveries postage & packing is based upon the value, size and weight of your order.

We always look to fulfil every order in full on time, but on the odd occasion an  item is missing we will attempt to contact you prior to shipping. If your order is a Next Day service, and we cannot contact you, we will refund the missing item(s), and ship the rest of the order immediately.

Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.

Please note we do not compensate in any way for time spent waiting in for deliveries that do not arrive, we do however accept that in life, mistakes and circumstances happen that can unfortunately mean that your item may not be delivered next day as requested e.g. bad weather, computer error etc. If such mistakes do occur we will refund your postage charge in full and by agreeing to the previous sentence and proceeding with the order you accept that we have done everything we can to help you obtain the package.

For orders outside of the UK Mainland please specify your location when calculating postage. 

For all international orders there may be an additional postage charge on top of that quoted. You will be contacted if this applies for your order. If the postage costs are too high, you may cancel your order at any time prior to dispatch.

For more information relating to Deliveries please see our Delivery Information.

2 - Returns

You can cancel any order that has not been dispatched. Please call our Customer Care team on 01484 644709 between 9:30am and 5:00pm or log onto the website and check the status of your order in your account.

If you do want to arrange the return of an item, simply call our friendly Customer Care team on 01484 644709 from 9:30am to 5:00pm and they will explain how to return the items.

Alternatively you can get in touch with us via our Contact Us Page.

If you are returning a product because it is faulty or something is wrong then we will pay for it to be returned to us. The Customer Care Team will arrange for cost you incur to be refunded.

Any none faulty return must be shipped back in full re-saleable order with original undamaged packaging.

You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee:  if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.

This guarantee ensures that if you are unsure about what you are purchasing you have the peace of mind of knowing that we are here to help. In addition, if you decide that you made a mistake or you change your mind then please send the goods back within 14 days of receipt. Sadly, this can only apply to standard range products; we cannot accept back any item that has been made to order i.e. Two Tone Airsoft equipment.

Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.
If you do decide to return anything for whatever reason then please get in touch with us via our Contact Us Page for a copy of our returns form.

If you do send goods back for any reason other than a fault you will normally be asked to pay the carriage charges, we would just have to recover the costs in our prices. We would rather be completely straight with you, keep our prices as low as possible, and just ask you to pay if you choose to return anything.

For more information relating to returns please see our Returns Policy Page.

Finance options

Looking to buy an Airsoft replica, but don't want to drop all your money at once? Perhaps you want to spread your payments over time to keep a backup of money, or perhaps you simply can't afford the hit right now and want to spread it over time? In any case you can spread your payments to take away the pain of the initial hit of the purchase of a replica, or give yourself the ability to spend that little bit more and get that rifle you've always wanted!

Want to know more about Airsoft Interest Free Finance?
You can check out our Airsoft Finance Info Page for more details >

Here at Patrol Base we have partnered with Omni Capital Retail Finance, allowing you to buy now pay later with ease.

You can select finance during the payment process which will take you to the Omnicapital portal and allow you to complete a credit check at your leisure. Once your finance is accepted you will be able to complete your order and wait for the goods to arrive!

Wondering how much it's going to cost?
Check out the examples below.

Looking to make the jump from BB guns to Airsoft, but don't want to save up to buy your entire loadout? Your time has come!

Airsoft replicas are leaps and bounds ahead of BB guns, but can sometimes carry a heavy price tag. You can spread the cost with us to save the strain on your wallet to allow you to buy your entire loadout at once, rather than piece by piece. Play now, pay later.

Want to know exactly why Airsoft Replica are so much better than BB Guns? Check out our BB Guns Page.

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