PTS Syndicate
Product code:
In Store
  • Centurion Arms C4 Rail
  • Electronic Recoil System
  • PTS Enhanced Body Parts

Love recoil, but hate gas, and bored of low powered blowback? No problems, weak and unreliable blowback is a thing of the past with the new Centurion Arms CM4 C4-10 ERG Recoil Assault Rifle. Featuring the KWA Electronic Recoil Blowback System this rifle has been designed by PTS to not only deliver power, but to feel as close to the real thing as possible, and be tactically adventitious.

Full description


Lovingly kitted out with PTS Syndicate this rifle features all the best of PTS's Enhanced Polymer range, coming with the EPM Stock, Pistol Grip, Advanced Ironsights and Pistol grip meaning its good to go right of out of the box. No need to gather aftermarket parts and fit them, this rifle comes pre-fitted with the highest quality parts already fitted.

Internally the weapon was built by KWA, using their ERG Recoil System, which not only features heavy hitting recoil but also has a functional Empty Stop Fire system which means that the weapon will stop firing when the magazine is empty. The weapon also features an adjustable Hop-Up system for range and accuracy and is adjustable by a large radial system rather than the traditional gear system which makes it easier to fine tune the amount of hop you require. The weapon is also rear wired to allow battery to be stored in the Stock. The weapon also features an ambidextrous fire select making it easier to change fire mode when transitioning between shoulder in CQB environments.

The front of the weapon features the 10'' PTS Centurion Arms C4 Four Point 20mm RIS / Ras Railed Handguard which is constructed entirely from heavy duty alloys making it tough and durable. Thanks to the choice of 20mm RIS / RAS it also means that you have access to a wide range of aftermarket parts and accessories which can be attached to the Top, Bottom, Left and Right of the handguard. This means you have the potential to create a huge array of weapon setups, and fine tune your loadout to match the scenario you will be playing.

This rifle is perfect for those Airsoft Players who are looking for a rifle which is not only highly realistic, but already comes pre-fitted with all the best PTS Syndicate parts available on the market today. If you're a fan of recoil, but not a fan of gas, then this rifle is for you. Keep on playing for longer without having to stop to re-gas your mags every half hour!


  • Designed by PTS, lovingly built by KWA
  • Electronic Recoil Shock System for Simulated Recoil
  • 10'' PTS Centurion Arms C4 Four Point 20mm RIS / Ras Rail
  • 10.3'' CQB Length Barrel
  • Full Top-Length 20mm RIS / RAS Rail
  • Full Alloy Construction where it matters
  • Full Alloy Receiver and Handguard
  • Ambidextrous Fire Mode Control System
  • EPBUIS Enhanced Backup Iron Sights
  • Enhanced Polymer PTS ERG Magazine
  • Magazine features a 30 / 120 round adjustable capacity
  • Enhanced Polymer PTS EPG-C Pistol Grip
  • Enhanced Polymer EPS Crane Stock
  • Rear wired Gearbox
  • Quick Change Spring System
  • Rubberised Textured Stock to reduce slippage
  • Adjustable Rotary Hop-Up System for range and accuracy
  • Non-functioning mock Forward Assist
  • Charging Handle Pulls back to reveal the Hop-Up Unit
  • Rear Ambidextrous Sling Plate
  • Mock Gas Block and Tube
  • 14mm CCW Threaded Outer Barrel
  • Removable Birdcage style flash hider
  • Rail Numbers Marked on the Handguard
  • Branded:
    • 'CME01171HK'
    • 'PTS'

Package Includes

  • Centurion Arms CM4 C4-10 ERG Recoil Assault Rifle
  • PTS ERG Magazine
  • Instruction Card

Special Instructions

This rifle can handle both traditional AEG Mags and PTS ERG Mags, though please note that the Magazine Empty Stop Firing system will only work with PTS ERG mags due to their extended BB Feed Guide.

Please ensure that before removing the flash hider you also remove the small grub screw which holds it in place.



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)
Approx. 350fps, using 0.20g BB
Site Legal Icon
Site Legal
Screwdriver Icon
Included Items
  • Magazine
  • Instruction Manual
Skill Level Icon
User Skill Level
Regular Player, Experienced Player,

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 3.3kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Colour Wheel Greyscale
Secondary Colour
Two Tone Icon
Pre Two-Toned
Construction Icon
Polymer Stock, Pistol Grip, Magazine, and Ironsights, with Alloy Receiver, Hand-guard, and Outer Barrel
Weapon Construction External
External Construction
Polymer , Alloy ,
Gearbox Icon
Internal Construction
Polymer , Alloy ,

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Electro Mechanical Blowback
Weapon Platform
M4 / AR15 / M16
Magazine Style Icon
Magazine Style
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Right Handed
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 behind dust cover


Weapon Furniture Icon
  • 10” PTS Centurion Arms C4 Rail
  • EPBUIS Enhanced Back Up Iron Sights
  • EP-C Pistol Grip
  • PTS EPS Stock
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Aperture Iron Sight
Sling Plate Icon
Sling Options
Buffer Plate , Stock ,


Outer Barrel Length (in)
Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Inner Barrel Length

Magazine Specific

Magazine Type
Medium Capacity , Spring Loaded, AEG, Adjustable Capacity, Magazine Empty Detection ,
Magazine BB Capacity
Approx. 120 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location

Electric Gun Specific Information

Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Digital Trigger Icon
Gearbox Electronic Trigger
Split Gearbox Icon
Split Gearbox Design
Airsoft Motor Icon
Motor Type
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya
Suggested Battery
Suggested Battery Type
Suggested Battery Configuration
Suggested Battery Voltage

Product Testing Data

Notepad Icon
Test Description
Using 0.20g BB
Notepad Icon
Tested Using
Blaster 0.2g BBs
Notepad Icon
Test Date

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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