


- Daniel Defense trademarks
- Full metal, realistic construction
- Western Arms based gas blowback system
If you're looking for a military-appropriate primary, not much seems more fitting than a Daniel Defense M4A1! The EMG Daniel Defense 12.5" M4A1 GBBR comes with complete Daniel Defense licensing, including gorgeous laser-engraved trademarks on the handguard and receiver.
It has a thunderous and immersive gas blowback system, based on the realistic Western Arms model. This means the platform disassembles just like a real M4A1 would. A lot of the internals have been constructed from steel, ensuring long-lasting durability, even with repeated use.
Inside, the OEM, King Arms, has furnished the build with robust steel trigger parts and a steel bolt catch, getting ahead of known failure points in high-wear components and saving you a wad of cash when it comes to upgrades. Also present is a 6.05mm tightbore inner barrel, providing an accuracy boost with high-quality ammo.
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
If you're looking for a licensed platform with a realistic disassembly, you need the EMG Daniel Defense 12.5" M4A1 GBBR. This Western Arms-based gas blowback rifle boasts satisfying recoil with every shot. It has internals which are remarkably close to those of a real AR-15, even compared to other GBBRs. If you collect realistic replicas, you'll love this!
Starting at the tip of the 14.5-inch outer barrel, we can find a birdcage-type flash hider pre-installed on the barrel’s 14mm CCW male threading. The birdcage design goes hand in hand with the handguard, and is the appropriate flash hider design for the real Daniel Defense M4A1 rifle.
If the birdcage is a bit too standard for your style or you are going for a special forces build, the 14mm CCW male threading at the tip of the outer barrel allows alternative flash hiders, suppressors or tracer units to be fitted to complete the look.
Moving rearwards, we come to the handguard, which is constructed from aluminium and is precisely machined using CNC technology. The handguard has 20mm Picatinny rails at the 3, 6, 9 and 12 o'clock positions and with 12.5 Inches of rail length available, you have plenty of space to add all the accessories that suit your playstyle and loadout.
Another benefit of this handguard is the free-float design. It prevents force from being applied to the barrel, allowing you to feel safe in the knowledge that your accuracy will be retained as much as possible when shooting from a supported position or steering the platform between targets.
The iron sights of the M4A1 are removable polymer flip-up aperture sights which mount to the upper 20mm Picatinny rail. Elevation adjustments are applied via the rotary dial below the front iron sight blade, and windage adjustments via the dial on the right side of the rear sight. The rear sight aperture can also be adjusted up and down via the dial on the sight itself, just below the aperture, for those who prefer to keep the front sight as is and apply all adjustments on the rear sight.
The receiver of the M4A1 is similar in form to every other AR out there, with the exception that, because it does not contain a gearbox, the receiver can be realistically sized. This results in a slim feel to the rifle and a positively skinny pistol grip, marking this out as a GBBR and making it genuinely hard to distinguish from a real AR. Obviously, this doesn't make it better or worse for skirmishing, but if you are like us and appreciate attention to detail and faithfulness to the real article, you will feel a strange sense of satisfaction handling this bad boy.
The bolt catch is right where we would expect; on the left side of the receiver, smack bang in the centre. On a GBBR, the bolt catch works exactly like the real thing, allowing you to quickly return the bolt carrier to battery after a reload and avoid using the charging handle. As with most of the hard-wearing parts on the M4A1, the bolt catch is constructed from steel, ensuring reliable bolt locking in the long term.
The fire selector lever is located on the left side of the receiver, allowing for safety, semi and fully automatic settings at 90-degree intervals. This means you can quickly switch between fire modes, but be safe in the knowledge that you won't accidentally move the selector into a fire position when you don't intend to. Worth noting is that, like the real steel AR platform and most other GBBRs, the fire selector cannot be set to "SAFE" without first cocking the rifle.
The trigger guard is the standard mil-spec flat type, keeping things in line with the real M4A1. The pistol grip is the legendary "A2" type, first seen on the M16A2 and commonly used in military builds. The grip boasts textured panels on each side for improved traction and a finger ridge to help support and control the front end of the rifle when held in the "high ready" position. Like its receiver, the M4A1's pistol grip is realistically sized and is compatible with GBBR and real steel pistol grips with some simple modifications.
At the base of the buffer tube is an ambidextrous sling plate sandwiched between the receiver and the castle nut. This plate is constructed from steel to provide the prerequisite strength for use with a single-point sling and uses a centrally positioned QD sling socket instead of the usual protruding loop. This sling point is ideal for a single-point bungee sling with a QD sling swivel, but can also be used with a two-point sling with the addition of a rail-mounted front sling point.
Following the sling plate, we come to the stock of the M4A1, which is the usual M4/AR15 format of a 6-position buffer tube with an adjustable crane battery stock. This stock can be locked into any 1 of the 6 positions and can be adjusted to suit any body type or loadout.
The stock is the EMG Alpha Combat Ready stock, boasting a rubber butt plate and an internal storage compartment which can be used for whatever you like. The Alpha stock also features a sling slot, ideally suited to strap-style slings. As with all AR buffer tube-equipped platforms, if you prefer a different stock solution, swapping the stock out for an alternative for AR buffer tubes is quick and easy.
Inside, this WA System-based GBBR features robust steel trigger-group components, enhancing long-term reliability and ensuring you'll never need to upgrade. The bolt catch is also made from steel, so this high-wear component has the strength to go the distance. Also inside is a 6.05mm tightbore inner barrel, enhancing accuracy with high-quality BBs and providing a slight FPS boost from the same pressure gas.
While the GBBR lifestyle is as challenging as it is rewarding, you simply cannot have a more realistic experience with any other type of platform. If you love realism, tinkering, and working hard in-game as the real warriors do, the EMG Daniel Defense® MK18 MOD 1 GBBR should be in your sights!
Features
- Full metal construction
- Licensed by Daniel Defense via EMG - Flawlessly authentic trademarks
- 6.05mm Tightbore inner barrel - Superb accuracy potential
- 14mm CCW Male threaded outer barrel - Tracer/suppressor ready
- CNC Aluminium M4A1 handguard - 20mm Picatinny rails at 3, 6, 9 & 12 o'clock, ready for accessories
- Rotary adjustable HOP-up unit - Accessible through the ports of the handguard with a small tool
- 20mm Picatinny railed receiver - Ready for a red dot sight or scope
- "Milspec" charging handle latch - Low profile design to reduce snags
- "A2" Finger ridged pistol grip - Perfectly matches the real steel MK18 MOD 1
- 6-Position M4/AR-15 buffer tube - Adjust the stock to suit your body type & loadout
- EMG Alpha Combat Ready stock pre-installed - Modern stock design with a sling slot & rubber butt plate
- Steel trigger parts - Robust, upgraded trigger components which will last a lifetime
- Compatible with King Arms M4/AR-15 GBBR Magazines (WA System)
Package Includes
- EMG Daniel Defense 12.5" M4A1 GBBR
- 50rnd Green Gas Magazine
- Speed Loader adapter
Specification
General
Platform Type | Assault Rifle |
|---|---|
Over 18 | Yes |
Defence / UKARA Required | Yes, No, |
Prebuilt | Yes |
Included Items | Magazine |
Skill Level | Advanced Player |
Warnings | Lubrication is required This GBBR cannot be put into the SAFE mode without first cocking the rifle. Do not force the selector into safe whilst the weapon is not cocked. |
Testing
FPS, using 0.20g BBs | Approx.340fps ± 10%, using 0.20g BBs |
|---|
Weight and Dimension
Weight (KG) | Approx.2.5KG |
|---|---|
Length | 78cm |
Length (Extended) | 86cm |
Construction
Primary Colour | Black, Half-Tan, |
|---|---|
Construction | CNC aluminium handguard. Alloy outer barrel, receiver, buffer tube & controls. Steel dust cover, body pins, castle nut & charging handle latch. High density polymer stock & pistol grip. |
OEM | King Arms |
Official License | Daniel Defense |
Weapon Specific
Powered By | Green Gas |
|---|---|
Blowback Type | Gas Blowback |
Platform | M4 / AR-15 / M16 |
Magazine Compatibility | King Arms / Western Arms Gas 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 | On the outer barrel base. Accessible through the handguard ports or with the lower handguard removed. |
Furniture
Furniture |
|
|---|---|
Rail System | 20mm RIS / RAS, 20mm Railed Receiver, |
Stock Type | Sliding, Multi-Position, |
Stock Positions | 6 |
Sight Type | Aperture Iron Sight |
Sling Options | Stock, Loop, |
Barrel
Outer Barrel Length (in) | 14.5'' |
|---|---|
Outer Barrel Thread Type | Male |
Outer Barrel Thread Direction | CCW (Counter Clockwise) |
Outer Barrel Thread Size | 14mm |
Inner Barrel Diameter | 6.05mm |
Inner Barrel Length | 370mm |
Magazine Specific
Magazine Type | Gas |
|---|---|
Magazine BB Capacity | Approx. 50 Rounds |
Gas Gun Specific
Gas Type | Green Gas |
|---|---|
Gas Recommendation | Green Gas |
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 |










