


- Full metal construction
- In-line MOSFET pre-installed
- Sliding stock G3 variant
If you're feeling the battle rifle vibe and want a replica which makes your ARs and AKs feel small, the Classic Army CA-A4 G3A4 AEG is the real man's primary you've been waiting for! A full metal build which is lighter than it looks, CA's G3A4 makes a fantastic base platform for a Swedish or Norwegian-inspired custom G3 build, but also looks fantastic as it is, bringing the cold, calculating German vibe to a full-fat battle rifle which will definitely turn heads on gameday.
Inside, this build is based around a version 2 gearbox with 18:1 ratio steel gears running on 9mm steel ball bearing bushings for a smooth, unlaboured gearbox report. An in-line MOSFET is pre-installed to prevent trigger lockups and enhance the rate of fire and trigger response. All internals are TM-spec, meaning aftermarket upgrades are prolific and ever available. We think this would make a fantastic DMR base gun, matching the looks of real-world G3 DMRs with version 2 gearbox compatibility!
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK 3-5 day Standard
£6.95
From
Dispatched with 24hr UK mainland
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
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.
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.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
Whether you're in the mood for a Cold War era battle rifle or you're sick and tired of AKs and ARs, the Classic Army CA-A4 G3A4 AEG will certainly raise an eyebrow! This full metal build replicates the legendary G3 battle rifle in sliding stock-equipped "A4" configuration, ideal for those working on a modernised G3 build for a Swedish or Norwegian Special Forces loadout.
Inside, the CA-A4 is equipped with a version 2 gearbox with an alloy shell, 18:1 ratio steel gears and 9mm ball bearing bushings. An in-line MOSFET is also included, designed to eliminate trigger lockups and enhance electrical efficiency. Everything inside is TM spec, meaning if you had a G3 DMR build planned, this would make a fantastic base gun!
Starting at the tip of the alloy outer barrel, we can find the appropriate G3-style birdcage flash hider, made from steel and mounted to the barrel's 14mm CCW male threads. This is the classic G3 muzzle device and looks right at home, but if you have other ideas, you can mount anything which fits 14mm CCW male threads, including tracer units, suppressors and alternative flash hiders. Following the flash hider, we can see the alloy outer barrel and its slight taper towards the receiver, matching the silhouette of the real rifle's barrel for the prerequisite realism we expect from an Airsoft AEG.
The front sight of the CA-A4 is mounted at the front of the cocking tube and handguard; the classic hooded HK front sight design, which pairs perfectly with the rotary drum diopter-style rear iron sight, found at the rear of the receiver. The rear sight offers 4 different apertures for aiming, marked 1-4 in 100-meter increments. This gives you the flexibility to put rounds on target in any ambient lighting condition and choose from an open sight notch, ideal for close range or an enclosed aperture, optimal for accurate semi-auto fire. To select your sight aperture, simply turn the drum using the helpful texturing around its circumference. The rear sight is also adjustable for windage via the screw on the right side.
Moving rearwards, we come to the cocking tube of the CA-A4, which contains the AEG's folding cocking handle. Pulling this handle rearwards and locking it up into the "safety notch" will retract the mock bolt carrier, found over on the right side of the AEG, and reveal the rotary HOP-up adjuster. The HOP-up allows the user to tune the CA-A4 for different ammo weights and vary the amount of backspin applied to each BB, looking for the flattest trajectory possible.
The handguard lies just below the cocking tube, and is the real-world accurate "Wide" G3A4 handguard, found on the real-world G3A4 and G3 SG1. The design of this handguard allows for the G3 SG1 bipod to be mounted and stowed in the grooves running along either side, while providing plenty of space inside for a battery which will last all day.
To access the battery compartment, simply push the pin at the front of the handguard out, slide the handguard forward slightly, then down and away from the rifle. Inside, you'll find a mini-Tamiya battery connector. For the CA-A4, we recommend a 7.4V 2600mAh LiPo battery for easy installation and a good fit. The mini-Tamiya connector is fitted to a Deans connector mounted to the MOSFET, so you can use a Deans battery if you remove the mini-Tamiya adapter.
Following the handguard, we reach the receiver, which is constructed from alloy with a realistic-looking phosphate finish (aka parkerized). The receiver includes mounting lugs on its upper surface, which are designed for HK claw mounts. If you want to hone the CA-A4 for long range and add a telescopic sight or red dot sight, you can with a 20mm Picatinny claw mount. Running along either side of the receiver, we can see the stock sliding recesses, which allow this G3 to be equipped with a sliding stock if you want a more compact package.
The lower receiver is known as the "trigger pack" in SMG-5 and G3 rifles and is constructed from alloy with a polymer grip module, just like the real thing. The 3-position fire selector is positioned on the left side, offering a SAFE - SEMI - AUTO configuration marked in German Style using "S-E-F" (Sicher - Einzelfeuer - Feuerstoß) lettering. The selector sits comfortably within reach of the shooter's thumb. The pistol grip module has ergonomic finger ridges built in, just like the real G3A4, moulded in olive drab polymer to match the other furniture. The trigger guard is nice and large, allowing for ease of use with full finger gloves, which is important as those finger shots hurt like *beep*!
The magazine release works similarly to an SMG-5 and includes a centrally positioned ambidextrous paddle magazine release and a secondary push button release on the right side, which is similar to an M4/AR-15. This gives you plenty of options for manipulating the G3A4. Whether you have an AK or AR background, or you are new to the game, you will have no issues making this rifle work for you.
At the rear, we're equipped with the G3A4 sliding stock, a two-position retractable stock design intended to reduce the overall length of the G3 platform for storage, transportation and deployment from vehicles and aircraft. This stock works the same way as the MP5 sliding stock, requiring the paddle-style catch to be pushed from the right side to release the locking mechanism. This will push the stock out slightly under spring pressure, ready to be pulled out and extended into the "deployed" position, where it will lock into place. Like the rest of the CA-A4, the stock is metal throughout, other than the super-grippy serrated rubber butt plate.
Inside, the CA-A4 is fitted with an alloy version 2 gearbox with 18:1 steel gears running on 9mm ball bearing bushings, reducing internal friction for a smooth, unlaboured gearbox sound. An in-line MOSFET improves electrical efficiency and cranks up trigger response, preventing trigger lockups which can occur with standard trigger contacts. All internal parts, including the HOP-up and inner barrel, are Tokyo Marui-spec, meaning aftermarket upgrades are practically unlimited; perfect for those who dream of a G3 DMR build!
Whether you're a fan of legendary Cold War-era battle rifles or you're working on a Swedish AK4 or Norwegian AG-3 build, the Classic Army CA-A4 G3A4 AEG should be in your sights! A superb quality full metal replica of one of Airsoft's lesser seen platforms, CA's G3A4 makes a fantastic primary for those sick and tired of AKs and ARs!
Features
- Full metal construction
- 14mm CCW Male threaded outer barrel - Tracer/suppressor ready
- Steel G3-style Birdcage flash hider - Completes the realistic look
- G3A4 "Wide" polymer handguard - Matches the German issue G3A4 perfectly
- Multi-aperture diopter iron sights - About the best irons out there, 4 apertures for aiming
- Ambi-friendly charging handle - On the left side, but can be reached from the right easily
- Rotary adjustable HOP-up unit - Accessible with the charging handle locked back
- Ambidextrous magazine release - Great for left or right-handed shooters
- Secondary push-through mag release on the right side - AR-style mag release
- HK Claw Mount compatible receiver - Add a 20mm Picatinny rail mount if you want to mount an optic
- 3-Position fire selector switch - SAFE - SEMI - AUTO configuration
- Finger-ridged pistol grip - Perfectly matches the real G3A4 trigger group
- Sliding stock - Sling point on the left side, 2 positions, grippy rubber butt plate
- Front-wired: Mini-Tamiya connector - Recommended Battery: 7.4V 2600mAh LiPo
- Version 2 Gearbox:
- Alloy shell
- In-line MOSFET
- 9mm Steel Ball bearing bushings
- Compatible with most G3 AEG Magazines - TM, Jing Gong, Fuxing & Classic Army branded
Package Includes
- Classic Army CA-A4 G3A4 AEG
- 500rnd High-capacity magazine
Specification
General
Platform Type | Assault Rifle |
|---|---|
Over 18 | Yes |
Defence / UKARA Required | Yes, No, |
Prebuilt | Yes |
Included Items | Magazine |
Skill Level | Regular Player |
Warnings | Li-Po Li-Po - Never Leave Charging Unattended Li-Po - Only Use Approved Chargers Li-Po - Charge in a Fire Safe Area |
Weight and Dimension
Weight (KG) | Approx.3KG |
|---|---|
Length | 84cm |
Length (Extended) | 102cm |
Construction
Primary Colour | Black |
|---|---|
Construction | Steel flash hider. Alloy outer barrel, cocking tube, receiver, trigger pack, stock & stock bars. High density polymer handguard & pistol grip. Rubber butt plate. |
Weapon Specific
Powered By | Electric |
|---|---|
Blowback Type | None |
Platform | G3 |
Magazine Compatibility | G3 AEG Magazines |
Fire modes | Safe Semi Automatic Full Automatic |
Safety Features | Trigger Lock |
Shooter Configuration | Right Handed |
Platform Configuration | Standard |
Platform Scale | 1:1 |
Suggested BB Weight | 0.25g |
Hop-Up
HOP-Up Adjuster Type | Rotary |
|---|---|
HOP-Up Adjustment Location | Inside the mock ejection port, accessible with the charging handle locked back. |
Furniture
Furniture |
|
|---|---|
Rail System | Railed Mount Available, HK Universal Mount, |
Stock Type | Sliding |
Stock Positions | 2 |
Sight Type | Rotary Drum Iron Sight |
Sling Options | Stock, Handguard, Loop, |
Barrel
Outer Barrel Length (in) | 17.7'' |
|---|---|
Outer Barrel Thread Type | Male |
Outer Barrel Thread Direction | CCW (Counter Clockwise) |
Outer Barrel Thread Size | 14mm |
Inner Barrel Diameter | 6.08mm |
Inner Barrel Length | 410mm |
Magazine Specific
Magazine Type | AEG, High Capacity, |
|---|---|
Magazine BB Capacity | Approx. 500 Rounds |
Electric Gun Specific Information
Gearbox
Gearbox Version | V2 Gearbox |
|---|---|
Gearbox Wiring | Front Wired |
Motor
Motor Type | Standard |
|---|
Battery Specific
Battery Voltage | 7.4V |
|---|---|
Battery Type | Li-Po |
Battery Connector | Mini Tamiya |
Suggested Battery Configuration | Nunchuck/Crane configuration. |
Testing
FPS, using 0.20g BBs | Approx.350fps ± 10%, using 0.20g BBs |
|---|---|
Testing Notes | Tested using 0.20g Delta Armory Diamond BBs |
Size guide
Joule Charts
Special Instructions
These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.
FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.
Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.
Tap the tabs below to open the relevant chart for your replica.
This table should be used for reference, and cannot be used to check one weight against another, as the weight of the BB affects the power.
In order to check if the BB can be used with your replica chronograph using the weight you wish to use and then compare it against the table.
Every time you change weights you will need to re-chrono and check against the table. This is not a conversion chart between weights.
Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.
| Velocity | BB Weight (Grams) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| FPS | 0.20 | 0.25 | 0.28 | 0.30 | 0.32 | 0.36 | 0.40 | 0.43 | 0.45 | 0.50 |
| 250 | 0.58 | 0.73 | 0.81 | 0.87 | 0.93 | 1.05 | 1.16 | 1.25 | 1.31 | 1.45 |
| 260 | 0.63 | 0.79 | 0.88 | 0.94 | 1.00 | 1.13 | 1.26 | 1.35 | 1.41 | 1.57 |
| 270 | 0.68 | 0.85 | 0.95 | 1.02 | 1.08 | 1.22 | 1.35 | 1.46 | 1.52 | 1.69 |
| 280 | 0.73 | 0.91 | 1.02 | 1.09 | 1.17 | 1.31 | 1.46 | 1.57 | 1.64 | 1.82 |
| 290 | 0.78 | 0.98 | 1.09 | 1.17 | 1.25 | 1.41 | 1.56 | 1.68 | 1.76 | 1.95 |
| 300 | 0.84 | 1.05 | 1.17 | 1.25 | 1.34 | 1.51 | 1.67 | 1.80 | 1.88 | 2.09 |
| 310 | 0.89 | 1.12 | 1.25 | 1.34 | 1.43 | 1.61 | 1.79 | 1.92 | 2.01 | 2.23 |
| 320 | 0.95 | 1.19 | 1.33 | 1.43 | 1.52 | 1.71 | 1.90 | 2.05 | 2.14 | 2.38 |
| 325 | 0.98 | 1.23 | 1.37 | 1.47 | 1.57 | 1.77 | 1.96 | 2.11 | 2.21 | 2.45 |
| 328 | 1.00 | 1.25 | 1.40 | 1.50 | 1.60 | 1.80 | 2.00 | 2.15 | 2.25 | 2.50 |
| 330 | 1.01 | 1.26 | 1.42 | 1.52 | 1.62 | 1.82 | 2.02 | 2.18 | 2.28 | 2.53 |
| 335 | 1.04 | 1.30 | 1.46 | 1.56 | 1.67 | 1.88 | 2.09 | 2.24 | 2.35 | 2.61 |
| 340 | 1.07 | 1.34 | 1.50 | 1.61 | 1.72 | 1.93 | 2.15 | 2.31 | 2.42 | 2.68 |
| 345 | 1.11 | 1.38 | 1.55 | 1.66 | 1.77 | 1.99 | 2.21 | 2.38 | 2.49 | 2.76 |
| 350 | 1.14 | 1.42 | 1.59 | 1.71 | 1.82 | 2.05 | 2.28 | 2.45 | 2.56 | 2.85 |
| 355 | 1.17 | 1.46 | 1.64 | 1.76 | 1.87 | 2.11 | 2.34 | 2.52 | 2.63 | 2.93 |
| 360 | 1.20 | 1.51 | 1.69 | 1.81 | 1.93 | 2.17 | 2.41 | 2.59 | 2.71 | 3.01 |
Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.
| Velocity | BB Weight (Grams) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| FPS | 0.20 | 0.25 | 0.28 | 0.30 | 0.32 | 0.36 | 0.40 | 0.43 | 0.45 | 0.50 |
| 250 | 0.58 | 0.73 | 0.81 | 0.87 | 0.93 | 1.05 | 1.16 | 1.25 | 1.31 | 1.45 |
| 260 | 0.63 | 0.79 | 0.88 | 0.94 | 1.00 | 1.13 | 1.26 | 1.35 | 1.41 | 1.57 |
| 270 | 0.68 | 0.85 | 0.95 | 1.02 | 1.08 | 1.22 | 1.35 | 1.46 | 1.52 | 1.69 |
| 280 | 0.73 | 0.91 | 1.02 | 1.09 | 1.17 | 1.31 | 1.46 | 1.57 | 1.64 | 1.82 |
| 290 | 0.78 | 0.98 | 1.09 | 1.17 | 1.25 | 1.41 | 1.56 | 1.68 | 1.76 | 1.95 |
| 300 | 0.84 | 1.05 | 1.17 | 1.25 | 1.34 | 1.51 | 1.67 | 1.80 | 1.88 | 2.09 |
| 310 | 0.89 | 1.12 | 1.25 | 1.34 | 1.43 | 1.61 | 1.79 | 1.92 | 2.01 | 2.23 |
| 320 | 0.95 | 1.19 | 1.33 | 1.43 | 1.52 | 1.71 | 1.90 | 2.05 | 2.14 | 2.38 |
| 330 | 1.01 | 1.26 | 1.42 | 1.52 | 1.62 | 1.82 | 2.02 | 2.18 | 2.28 | 2.53 |
| 340 | 1.07 | 1.34 | 1.50 | 1.61 | 1.72 | 1.93 | 2.15 | 2.31 | 2.42 | 2.68 |
| 350 | 1.14 | 1.42 | 1.59 | 1.71 | 1.82 | 2.05 | 2.28 | 2.45 | 2.56 | 2.85 |
| 360 | 1.20 | 1.51 | 1.69 | 1.81 | 1.93 | 2.17 | 2.41 | 2.59 | 2.71 | 3.01 |
| 370 | 1.27 | 1.59 | 1.78 | 1.91 | 2.03 | 2.29 | 2.54 | 2.73 | 2.86 | 3.18 |
| 380 | 1.34 | 1.68 | 1.88 | 2.01 | 2.15 | 2.41 | 2.68 | 2.88 | 3.02 | 3.35 |
| 390 | 1.41 | 1.77 | 1.98 | 2.12 | 2.26 | 2.54 | 2.83 | 3.04 | 3.18 | 3.53 |
| 400 | 1.49 | 1.86 | 2.08 | 2.23 | 2.38 | 2.68 | 2.97 | 3.20 | 3.34 | 3.72 |
| 410 | 1.56 | 1.95 | 2.19 | 2.34 | 2.50 | 2.81 | 3.12 | 3.36 | 3.51 | 3.90 |
Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.
| Velocity | BB Weight (Grams) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| FPS | 0.20 | 0.25 | 0.28 | 0.30 | 0.32 | 0.36 | 0.40 | 0.43 | 0.45 | 0.50 |
| 250 | 0.58 | 0.73 | 0.81 | 0.87 | 0.93 | 1.05 | 1.16 | 1.25 | 1.31 | 1.45 |
| 260 | 0.63 | 0.79 | 0.88 | 0.94 | 1.00 | 1.13 | 1.26 | 1.35 | 1.41 | 1.57 |
| 270 | 0.68 | 0.85 | 0.95 | 1.02 | 1.08 | 1.22 | 1.35 | 1.46 | 1.52 | 1.69 |
| 280 | 0.73 | 0.91 | 1.02 | 1.09 | 1.17 | 1.31 | 1.46 | 1.57 | 1.64 | 1.82 |
| 290 | 0.78 | 0.98 | 1.09 | 1.17 | 1.25 | 1.41 | 1.56 | 1.68 | 1.76 | 1.95 |
| 300 | 0.84 | 1.05 | 1.17 | 1.25 | 1.34 | 1.51 | 1.67 | 1.80 | 1.88 | 2.09 |
| 310 | 0.89 | 1.12 | 1.25 | 1.34 | 1.43 | 1.61 | 1.79 | 1.92 | 2.01 | 2.23 |
| 320 | 0.95 | 1.19 | 1.33 | 1.43 | 1.52 | 1.71 | 1.90 | 2.05 | 2.14 | 2.38 |
| 330 | 1.01 | 1.26 | 1.42 | 1.52 | 1.62 | 1.82 | 2.02 | 2.18 | 2.28 | 2.53 |
| 340 | 1.07 | 1.34 | 1.50 | 1.61 | 1.72 | 1.93 | 2.15 | 2.31 | 2.42 | 2.68 |
| 350 | 1.14 | 1.42 | 1.59 | 1.71 | 1.82 | 2.05 | 2.28 | 2.45 | 2.56 | 2.85 |
| 360 | 1.20 | 1.51 | 1.69 | 1.81 | 1.93 | 2.17 | 2.41 | 2.59 | 2.71 | 3.01 |
| 370 | 1.27 | 1.59 | 1.78 | 1.91 | 2.03 | 2.29 | 2.54 | 2.73 | 2.86 | 3.18 |
| 380 | 1.34 | 1.68 | 1.88 | 2.01 | 2.15 | 2.41 | 2.68 | 2.88 | 3.02 | 3.35 |
| 390 | 1.41 | 1.77 | 1.98 | 2.12 | 2.26 | 2.54 | 2.83 | 3.04 | 3.18 | 3.53 |
| 400 | 1.49 | 1.86 | 2.08 | 2.23 | 2.38 | 2.68 | 2.97 | 3.20 | 3.34 | 3.72 |
| 410 | 1.56 | 1.95 | 2.19 | 2.34 | 2.50 | 2.81 | 3.12 | 3.36 | 3.51 | 3.90 |
| 420 | 1.64 | 2.05 | 2.29 | 2.46 | 2.62 | 2.95 | 3.28 | 3.52 | 3.69 | 4.10 |
| 430 | 1.72 | 2.15 | 2.40 | 2.58 | 2.75 | 3.09 | 3.44 | 3.69 | 3.86 | 4.29 |
| 440 | 1.80 | 2.25 | 2.52 | 2.70 | 2.88 | 3.24 | 3.60 | 3.87 | 4.05 | 4.50 |
| 450 | 1.88 | 2.35 | 2.63 | 2.82 | 3.01 | 3.39 | 3.76 | 4.04 | 4.23 | 4.70 |
| 460 | 1.97 | 2.46 | 2.75 | 2.95 | 3.15 | 3.54 | 3.93 | 4.23 | 4.42 | 4.91 |
| 470 | 2.05 | 2.57 | 2.87 | 3.08 | 3.28 | 3.69 | 4.10 | 4.41 | 4.62 | 5.13 |
| 480 | 2.14 | 2.68 | 3.00 | 3.21 | 3.42 | 3.85 | 4.28 | 4.60 | 4.82 | 5.35 |
| 490 | 2.23 | 2.79 | 3.12 | 3.35 | 3.57 | 4.02 | 4.46 | 4.80 | 5.02 | 5.58 |
| 500 | 2.32 | 2.90 | 3.25 | 3.48 | 3.72 | 4.18 | 4.65 | 4.99 | 5.23 | 5.81 |
| 510 | 2.42 | 3.02 | 3.38 | 3.62 | 3.87 | 4.35 | 4.83 | 5.20 | 5.44 | 6.04 |














