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From £119.99
  • Rotary HOP Unit
  • 6.03mm Inner Barrel
  • Quick Change Spring

An Airsoft Electric Gun based on the M4 platform, which features a modular URX style handguard for complete tactical flexibility, as well as a wealth of internal goodness that you would expect to see on a rifle at a much higher price point.

From £129.99
  • Rotary HOP Unit
  • 6.03mm Inner Barrel
  • Quick Change Spring

An Airsoft Electric Gun based on the M4 platform, which features a modular URX style handguard for complete tactical flexibility, as well as a wealth of internal goodness that you would expect to see on a rifle at a much higher price point.

From £169.99
  • 6.03mm tightbore inner barrel
  • Super lightweight polymer build
  • Full-length top RIS rail

Perfect for CQB combat and manoeuvrability, the Arcturus AT-ST01 sports an ultra-light full polymer build complete with a slimline 10-inch hybrid M-LOK and Picatinny handguard, that offers you the best of both worlds, ready for any type of attachment you can throw at it.

The rifle also features a full length monolithic top rail and sling plate in addition to slimline low-profile stock, which further keeps you agile on your feet in tight spaces. This AEG has everything you'd hope for in a modern AR, especially in a fast-paced CQB environment.

From £169.99
  • 6.03mm tightbore inner barrel
  • Super lightweight polymer build
  • Full-length top RIS rail

Perfect for CQB combat and manoeuvrability, the Arcturus AT-ST01 sports an ultra-light full polymer build complete with a slimline 10-inch hybrid M-LOK and Picatinny handguard, that offers you the best of both worlds, ready for any type of attachment you can throw at it.

The rifle also features a full length monolithic top rail and sling plate in addition to slimline low-profile stock, which further keeps you agile on your feet in tight spaces. This AEG has everything you'd hope for in a modern AR, especially in a fast-paced CQB environment.

From £129.99
  • 6.03mm inner barrel
  • 20mm railed receiver
  • Threaded outer barrel

For those of you that like going Commando! Lancer's M933 is a replica of the lesser-seen Commando length M4/AR15, rocking a tightbore inner barrel, quick change spring system and threaded outer barrel as well as adjustable stock and removable railed sights. Bridging the gap between outdoor and CQB environments.

From £329.99
  • The latest ARP556 platform
  • Side folding skeleton stock - CHFS system
  • G&G MIG inside - MOSFET Integrated Gearbox

CQB Experts and ARP9 fans, you're going to want to check this out! The ARP556 3.0 is here, bringing the same energetic performance as the ARP9 3.0 but with a 5.56 style receiver for compatibility with standard M4/AR-15 magazines. If you held out on the ARP9 3.0 because you don't want to buy more mags, get this one, it's just as epic!

Inside the ARP556 3.0, you will find a generous selection of pre-upgraded parts, including G&G's new MOSFET integrated gearbox, known as the "MIG". The MIG features G&G's new MOSFET system which is smaller and more efficient than ever before, and a QD spring guide to allow for easy power tuning without needing to take the gearbox apart. Other innovations include a new side folding stock system, known as the CHFS, and a new double-feed magazine. The other awesome G&G pre-upgraded internals remain, including the epic 25,000 RPM high speed motor which is ready to provide the thunderous rate of fire the ARP9 and ARP556 are known for.

If you're searching for the ideal CQB primary, this is practically it. With a bite-sized external form but king-size performance, the ARP556 3.0 is a piece to contend with up close and will be an asset to any aggressive outdoors skirmisher who values an intense rate of fire and lightweight yet rock-solid build!

From £129.99
  • 6.03mm Tightbore inner barrel
  • Pre-upgraded version 2 gearbox
  • High density polymer construction

If you love the standard issue US Army M4A1 carbine, this should suit you! The Delta Armory DA-C03 CHARLIE™ M4A1 RAS AEG is styled after the M4A1 as it is issued to the US Army, featuring a RAS style quad 20mm railed handguard, M4A1 barrel profile with M203 cutout and the iconic AR-15 triangular front sight, along with some thoughtful modern ergonomic enhancements to improve handling. 

On the outside, Delta has added a gunfighter mod.3 style ergonomic pistol grip and the awesome Delta Armory battery stock and enhanced receiver, complete with gripping texture on the magazine well and a built-in enlarged trigger guard. As a replica of the Delta Armory CHARLIE™ line, the DA-C03 is constructed primarily from high density polymer with alloy trim parts to provide manageable weight and maintain peak agility in game. 

On the inside, the DA-C03 is kitted out with a tightbore inner barrel, a rotary HOP-up unit, and a pre-upgraded gearbox featuring an SHS tappet plate and piston, 7mm bushings and a quick change spring guide. Needless to say, this platform is superb value considering its features and is the perfect AEG for a new skirmisher who wants a cost-effective primary without any performance compromises!

From £159.99
  • MOSFET Inside
  • Microswitch Trigger
  • Quick Change Spring

An AR platform replica which is built from very tough High-Density Nylon Fibre Polymer, and features a MOSFET, Quick Change Spring and Microswitch Trigger, making this the absolute perfect Starter Gun.

From £249.99
Was £284.99
Save £35.00
  • GATE X-ASR MOSFET
  • Specna ORION Gearbox
  • Aluminium/Zinc Alloy & Steel

The Specna Arms SA-E12 PDW EDGE™ is an AR Platform Airsoft Electric Gun featuring the ORION Gearbox, crammed full of goodies that make this an excellent choice straight out of the box. This version of the rifle comes with a PDW Style Stock that helps keep overall length down, and makes it ideal for all locations and arenas.

From £269.99
Was £284.99
Save £15.00
  • GATE X-ASR MOSFET
  • Specna ORION Gearbox
  • Aluminium/Zinc Alloy & Steel

The Specna Arms SA-E12 PDW EDGE™ is an AR Platform Airsoft Electric Gun featuring the ORION Gearbox, crammed full of goodies that make this an excellent choice straight out of the box. This version of the rifle comes with a PDW Style Stock that helps keep overall length down, and makes it ideal for all locations and arenas.

From £269.99
  • Uprated Internals
  • Quick Change Spring
  • Zinc/Aluminium/Steel

An Airsoft Electric Gun based on the M4 platform, which offers Zinc/Aluminium externals, microswitch trigger, a quick change spring system and top spec components in one rock-solid package.

From £129.99
  • 6.03mm Tightbore inner barrel
  • Pre-upgraded version 2 gearbox
  • High density polymer construction

Beginners and veterans alike, if you need a lightweight performance-oriented M4/AR-15 platform either to add to the arsenal or as your first AEG, Delta Armory is one to watch! New to the scene with loads of potential, the DA-C04 CHARLIE™ M4/AR-15 KeyMod AEG is constructed almost entirely from strong high density polymer for a lightweight and agile build with an alloy outer barrel to add strength where needed. 

The DA-C04 comes equipped with a KeyMod-style handguard with removable proprietary 20mm rail sections, a 20mm railed receiver ready for a red dot sight or scope, an ergonomic pistol grip styled after one of the most modern real steel AR grips and a threaded outer barrel for your tracer/suppressor needs. 

Inside, it gets even better! The reinforced version 2 gearbox boasts a quick change spring guide, an SHS piston and tappet plate, 7mm bushings and a steel 18:1 gearset. To add some accuracy and range into the mix, the DA-C04 is kitted out with a 6.03mm tightbore inner barrel and rotary HOP-up unit, giving you some of the best internal options pre-installed. If you want a lightweight primary you will never need to touch internally, this is it!

From £209.99
  • 6.03mm Tightbore inner barrel
  • Pre-upgraded version 2 gearbox
  • High density polymer construction

Beginners and veterans alike, if you need a lightweight performance-oriented M4/AR-15 platform either to add to the arsenal or as your first AEG, Delta Armory is one to watch! New to the scene with loads of potential, the DA-C04 CHARLIE™ M4/AR-15 KeyMod AEG is constructed almost entirely from strong high density polymer for a lightweight and agile build with an alloy outer barrel to add strength where needed. 

The DA-C04 comes equipped with a KeyMod-style handguard with removable proprietary 20mm rail sections, a 20mm railed receiver ready for a red dot sight or scope, an ergonomic pistol grip styled after one of the most modern real steel AR grips and a threaded outer barrel for your tracer/suppressor needs. 

Inside, it gets even better! The reinforced version 2 gearbox boasts a quick change spring guide, an SHS piston and tappet plate, 7mm bushings and a steel 18:1 gearset. To add some accuracy and range into the mix, the DA-C04 is kitted out with a 6.03mm tightbore inner barrel and rotary HOP-up unit, giving you some of the best internal options pre-installed. If you want a lightweight primary you will never need to touch internally, this is it!

From £249.99
Was £284.99
Save £35.00
  • GATE X-ASR MOSFET
  • Quick Change Spring
  • Aluminium, Zinc & Steel

An Aluminium, Zinc and Steel constructed replica which features the GATE X-ASR MOSFET for rapid trigger response and longer life. Featuring up-rated internals and a quick change spring on the gearbox, the SA-E13 Edge is not one to miss.

From £259.99
  • Full metal construction
  • 6.03mm Tightbore inner barrel
  • 17.5-inch Outer barrel - Perfect for a DMR build

If you are planning a DMR build you have one more base gun to consider, thanks to ARCTURUS! The M4/AR-15 SPR Rifle boasts a lengthy 17.5-inch outer barrel and 15-inch M-LOK handguard, making it the perfect length for SPR/DMR duty. The M4/AR-15 SPR is remarkably light for a full metal rifle of its size and offers a wealth of accessory options with its M-LOK handguard and seamless handguard receiver rail integration, meaning if you want a huge optical sight you have plenty of room to mount it.

On the inside, the M4/AR-15 SPR is equipped with the same rock solid internals as ARCTURUS's other designs, with many parts which lend themselves to a DMR build already installed, including a 6.03mm tightbore inner barrel made from steel for extra rigidity. Whether you are keeping full auto for a proper SPR, or going for a high FPS DMR build and saying goodbye to the fun mode, the M4/AR-15 SPR is a great base gun for any long range oriented setup!

From £319.99
  • GATE ASTER Inside
  • Optical Trigger Array
  • Amazing Value for Money

A solid and dependable AR Platform Airsoft Gun, powered by a Battery in the Stock. This 2.0 variant of the Specna Arms EDGE Series updates the MOSFET with a GATE ASTER™ for more control than ever before, as well as a Solar™ Electronic Trigger and Helium™ Flat HOP Bucking. Packaged with the uprated internals that makes the EDGE series so special, this is one exceptional 'out of the box' Airsoft Gun. Whether you're a new player wanting to get the most for their money, or an experienced player looking for the next step up in quality, then the Specna Arms SA-E23 EDGE 2.0 is exactly that.

Available in Black or with a gorgeous dual-tone Chaos Bronze highlight.

From £329.99
Was £354.99
Save £25.00
  • Full metal construction
  • Gate ASTER MOSFET pre-installed
  • Modernised receiver with ambidextrous controls

Specna continue with their exceptional EDGE 2.0 line with the SA-E13-RH. An ultra-modern carbine that features a totally unique looking front end with weight-reducing cuts that show off the glorious 14.5 inch barrel. Included are a host of unique Specna external goodies such as the refined "billet" style receiver and Heavy Ops Stock.

But Specna's quest to modernise Airsoft doesn't stop there as the SA-E13-RH comes with a wealth of top-notch internals such as the advanced Gate ASTER MOSFET, a high torque motor and a healthy helping of reinforced gearbox components all contained in the glorious ORION gearbox with a 6.03mm tightbore inner barrel and rotary HOP-up unit, all coming together for an impressively accurate and advanced carbine.

From £339.99
  • MOSFET Inside
  • Microswitch Trigger
  • Quick Change Spring

An amazingly solid AR platform replica from CYMA, in a series of rifles which could possibly be the greatest AEGs they have ever released. Not only is it almost entirely made from Aluminium externally, it features a MOSFET, Microswitch Trigger, Quick Change Spring and many more internal bonuses.

From £203.99
Was £239.99
Save £36.00
  • Period accurate M653
  • MOSFET inside
  • Tight bore 6.03 inner barrel

If you are looking for a primary for your Vietnam war loadout this will do the trick! Complete with period accurate pencil barrel and 2 position XM177 style stock, the CM.009D M653 is the old school tacticool carbine from a time before the M4!

From £209.99
  • Full metal construction
  • 6.03mm Tightbore inner barrel
  • CNC Aluminium M-LOK/20mm hybrid handguard

If you need a platform for dealing with foes at range, the DA-A15 ALPHA™ is the right tool for the job. This Delta Armory AEG boasts full metal construction and a selection of pre-upgraded internals, including a 6.03mm tightbore inner barrel, rotary HOP-up unit and an upgraded piston, delayer chip and tappet plate from SHS. 

On the outside, we are treated to an M-LOK handguard styled after the popular Strike rail system, a unique Delta Armory receiver featuring a built-in enlarged trigger guard and magazine well gripping texture along with the simply awesome Delta Armory battery stock, to name but a few of the slick ergonomic features of the platform. If you need a longer platform for a DMR build or woodland warfare, the DA-A15 is a sure hit if you are into modern ARs!

From £249.99
  • Full metal construction
  • 6.03mm Tightbore inner barrel
  • Ambidextrous controls - Great for lefties!

If you want the gucci look but you don't want to part with those gucci bucks, Double Bell has something you may like! The BY-817 M-416 A5 AEG is styled to match a certain real-world rifle we all know and love and boasts full metal construction, fantastic attention to detail and pre-upgraded internals including a 6.03mm tightbore inner barrel, reinforced steel gears and a quick change spring system for easy power tuning.

As with the latest iteration of the real rifle, the Double Bell AEG is also rocking a full set of ambidextrous controls, making this a fantastic platform for left-handed shooters and those who use shoulder-to-shoulder transitions to make the best use of surrounding cover. Whether you run a special forces loadout or you are looking for a lefty-friendly AR platform with an elite look, the Double Bell M-416 A5 should suit you perfectly!

From £219.99
  • Full metal construction
  • 6.03mm Tightbore inner barrel
  • KeyMod handguard w/integral suppressor

If you are keeping your eye out for a base for your dream DMR build and have a certain sneaky playstyle, the DA-A10 ALPHA™ Silent Ops DMR should fit you like a glove. This M4/AR-15 platform is part of Delta Armory's ALPHA™ line, top of the range when it comes to externals and boasting more than its fair share of pre-upgraded internal parts as a bonus!

Inside, you will find a reinforced V2 gearbox shell, SHS piston with a full steel tooth rack, a quick change ball bearing spring guide and a 6.03mm tightbore inner barrel paired with a rotary HOP-up unit for impressive long-range effectiveness. The quick change spring makes for a relatively easy DMR upgrade, meaning if you want the DA-A10 to live up to its name you'll have a much easier time of it! 

Whether you want a stealthily styled AR platform for mid to long range engagements or you're working on a suppressed DMR build, the DA-A10 ALPHA™ Silent Ops DMR already has the aesthetic and the upgraded internals; all it needs is pointing in the right direction!

From £239.99
  • Full metal construction
  • FALCON EFCS inside - Ready for burst & binary
  • Officially licenced by Aeroknox LLC, TX

If you're all about your modern M4/AR-15 platforms, the Double Eagle M920A Aeroknox AX//15 AEG is certain to catch your eye. This full metal M4/AR-15 platform sidesteps convention with a unique receiver, handguard, muzzle brake and pistol grip based on designs from Aeroknox LLC of Texas, with official licencing of course!

In line with other recent Double Eagle releases, the AX//15 boasts the impressive FALCON EFCS MOSFET pre-installed, giving the AEG an astonishing trigger response and rate of fire thanks to the improvements in electrical efficiency along with the ability to program the fire controls for burst modes, binary trigger and trigger sensitivity. These features are usually only found in AEGs twice this price! While it shoots like a dream, the AX//15 looks even better, with immaculately engraved Aeroknox trademarks across the design, flawlessly machined metal components and strong high density polymer furniture.

While high-end AR AEGs with interesting looks are a pound a penny these days, the AX//15's combination of slick ergonomics, gorgeous looks, phenomenal performance and great value for money make it a Patrol Base favourite. Make sure you get yours before we buy them all for ourselves!

From £329.99
  • MOSFET Inside
  • Microswitch Trigger
  • Quick Change Spring

The CM.097A Platinum edition provides a complete, high-end AEG out of the box. With pre-upgraded features such as a Micro-switch trigger, MOSFET, and quick change spring system built into the premium gearbox the Cm.097A Platinum edition offers incredible performance and a package that is half the price of its rivals.

From £349.99
  • MOSFET Inside
  • Microswitch Trigger
  • Quick Change Spring

A well built and well thought out Airsoft Electric replica of the AR-10 platform, which offers tough construction and a wealth of top-tier features such as a Quick Change Spring, Microswitch Trigger, MOSFET and other high-quality internals to make this perfect for beginners and experts alike.

From £119.99
  • LPEG - Low Power Electric Gun
  • Compatible with standard AEG magazines
  • Perfect for Airsoft skirmishers of the future!

If you have a younger sibling or child who wants to get into Airsoft but they aren't yet old enough for the real deal, this LPEG is ideal to help them learn the ropes! The Umarex H&K HK416 CQB Low Power Electric Gun is designed to cater to the younger market, offering a super lightweight electric powered Airsoft gun which runs at around half the muzzle energy of standard AEG, making it safer and less painful to get hit by but just as fun to use as the full-fat skirmishable models.

Compatibility-wise, this HK416 can accept standard Airsoft AEG magazines and 8.4V NiMh batteries with mini-Tamiya connectors, but both the externals and internals are proprietary and not compatible with standard AEG parts. The good news is that the 20mm Picatinny rails on the receiver and handguard can accept most Airsoft 20mm Picatinny accessories, meaning you can mount a red dot sight and a grip to give this low-cost, low-power, high-fun HK416 the elite look.

From £209.99
  • Full metal construction
  • 6.03mm Tightbore inner barrel
  • Reinforced gearbox with quick change spring

If you want to start your Airsoft adventure with a realistic full metal platform or you have your eye on an MK18 MOD.1, the Delta Armory MK18 MOD.1 ALPHA™ should suit you! This AEG is based on the standard issue rifle of the US Navy SEALs but with some modern external enhancements mimicking high-end civilian tactical setups. 

Being an AEG of the ALPHA™ line, this MK18 MOD.1 is considerably pre-upgraded straight out of the box, boasting a reinforced gearbox shell, SHS piston with a full steel tooth rack, a quick change ball bearing spring guide and a 6.03mm tightbore inner barrel paired with a rotary HOP-up unit for impressive long-range effectiveness. 

With more Picatinny rails than you'll ever need, a unique modern receiver design and the impressive Delta Armory battery stock, the MK18 MOD.1 ALPHA™ is perfect for skirmishers who want the realistic feel of full metal and the performance to back it up!

From £239.99
  • Programmable ETU pre-installed
  • High density Carbontech polymer receiver
  • 6.01mm Tightbore inner barrel

The Italian brand Evolution Airsoft has made a name for itself by providing pre-upgraded AEGs with superb quality externals, giving Airsofters what we always wanted; a gun we don't have to mess with! Though some live for the "thrill" of installing upgrades and hoping they work, for the rest of us, Evolution Airsoft has come through once again! The Smart Airsoft Gun series features the same impressive internals and rock solid externals as previous Carbontech AEGs, but with the new and improved ETS II installed.

From £249.99
  • Full metal construction
  • MOSFET & High torque motor pre-installed
  • CNC Aluminium 7" M-LOK/20mm hybrid handguard

If you're looking for a compact AR platform with more than its fair share of perks, look no further than the Delta Armory DA-A13-ETU ALPHA™. This AEG is at the very top of Delta Armory's range, boasting the full metal external build of the ALPHA™ series paired with the ETU series internals, resulting in a beast of a platform, both inside and out.

Equipped with an M-LOK handguard constructed from CNC machined aluminium, the unique Delta Armory receiver, an ergonomic pistol grip based on the gunfighter mod.3 grip and a pre-installed aluminium angled foregrip, you have little left to do on the outside other than add your favourite optic!

The news is similarly impressive inside! The version 2 gearbox has a reinforced shell, CNC aluminium piston and cylinder heads, CNC steel 16:1 gears running on 7mm ball bearing bushings and a high torque neodymium magnet motor to deliver the torque needed for a lightning-fast trigger response. The barrel is a 6.03mm tightbore paired with a rotary HOP-up unit, granting this compact PDW-esque AR surprising long range performance. A programmable ETU/MOSFET system improves electrical efficiency and allows for burst mode, binary trigger and pre-cocking to be programmed in using the fire controls of the AEG itself. If you don't want the fuss, troubleshooting and tuning that comes with upgrading your own beast of an AEG, no need to put yourself through that, Delta Armory has done it for you!

From £119.99
  • 6.03mm Tightbore inner barrel
  • Pre-upgraded version 2 gearbox
  • High density polymer construction

If you are looking for a base gun for your dream custom AR or you like the classic look, the Delta Armory DA-C01 CHARLIE™ M4A1 is what you need. This M4/AR-15 AEG is styled after the original M4A1 rifle of the 1990s but with some 21st-century ergonomic enhancements to improve handling and a styled-up Delta Armory receiver matching modern real steel "billet" receivers. 

Being a replica of the Delta Armory CHARLIE™ line, the DA-C01 is constructed primarily from high density polymer with alloy trim parts and is kitted out on the inside with a tightbore inner barrel, a rotary HOP-up unit, and a pre-upgraded gearbox featuring an SHS tappet plate and piston, 7mm bushings and a quick change spring guide. 

With more pre-upgraded internals than a platform this price deserves and some stylish, modern enhancements, the DA-C01 would make a fine basis for a custom build but can also be left as it is to take advantage of some interesting old-school features!

M4, AR-15 and M16 platforms are some of the most popular in the Airsoft community. At Patrol Base, we have a great selection of these rifles and their variants, including US Army M4A1 and M16 replicas. Not to forget the highly popular MK.18 MOD.1 rifle, an iconic AR-15 design used by Delta Force and the US Navy SEALs!

From gas-powered GBBR M4s with exciting recoil to high-performance AEG M4s which shoot perfectly in any weather conditions, we have an M4/AR-15 platform to suit all skill levels and playstyles, from CQB specialists to long-range Designated Marksmen. 

If you’re looking for an Airsoft platform to upgrade, an M4/AR-15 AEG is ideal thanks to its wide aftermarket support, customisation options and accessory attachment interfaces. Parts are easy to replace and accessories can be mounted straight away in most cases; perfect for those who dream of their own custom Airsoft gun!

If you're struggling to choose which M4 is right for you, read our blog post and watch our video about M4 Assault Rifles

Shop our huge selection of AR-15, M16 and M4 Airsoft AEGs and GBBRs online or visit us at our store in Huddersfield to see the range in person!