
- Full metal construction
- 6.03mm Tightbore inner barrel
- MOSFET Pre-installed
If you love the sneaky styling of integrally suppressed M4s but prioritise a realistic build, the PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG ticks both boxes! An almost dead-on replica of the real steel Griffin Armament MK1 M4SD, this full metal AEG is bristling with licensed PTS replica furniture front to back, including the Griffin SR M-LOK handguard, GP5 Suppressor, ECS™ stock and PTS EP trigger guard. As we might expect from PTS, this is a flawless build on the outside, though there is also plenty of good stuff internally!
Inside, we have the prolific version 2 gearbox with Tokyo Marui-spec internals, ideal for upgrade fiends. That said, the MK1 M4SD doesn't really need upgrading, equipped with an integrated MOSFET/ETU, CNC aluminium double O-ring cylinder head, steel 18:1 ratio gears, 8mm ball bearing bushings and a reinforced piston with a MIM steel tooth rack. Also inside is a 6.03mm tightbore inner barrel and alloy rotary HOP-up unit, giving you what you need to get the job done at long range.
The MK1 M4SD is available in two length variants: the 7.5-inch model, ideal for close quarters and fast movers, and the 10.5-inch version, ideal for multi-role use. If a primary with the "honey badger" look has been on your shopping list but a realistic build is essential, the PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG belongs in your arsenal!
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 Standard
£6.95
From
UK 24hr Dispatch
£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 a sneaky skirmisher on the field or you're into cutting-edge real steel designs, the PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG should suit you perfectly! Boasting full metal construction and licensed PTS Griffin Armament furniture, this sneaky beaky AEG is available in two length variants: the 7.5-inch handguard version for close quarters and the longer 10.5-inch handguard variant, ideal for skirmishers who operate in a variety of environments.
Inside, the MK1 M4SD is well equipped, based around the common version 2 gearbox with 18:1 steel gears running on 8mm ball bearing bushings, a quick change spring guide, a CNC aluminium double O-ring cylinder head and a reinforced polymer piston with a full MIM steel tooth rack. A 36K RPM high torque motor provides the necessary torque for a snappy trigger in semi-auto and is kept in check by an in-line MOSFET/ETU, further enhancing electrical efficiency. Also inside is a 6.03mm tightbore inner barrel and alloy rotary HOP-up unit, ensuring you have what you need to hit out to extended ranges.
A "gucci" build straight out of the box, the MK1 M4SD is the more realistic option for those into the popular integrally suppressed M4 shape but seeking a plausible build. If you like M4/AR-15s from the high end of Airsoft with a covert look, the PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG should be your next primary!
Starting at the front, we can find the PTS Griffin GP5 suppressor, constructed from CNC 6000 series aluminium with realistic Griffin Armament markings. This is a superb quality suppressor, far better than most found pre-installed on other M4SD-style rifles and blends perfectly with the other licensed PTS Griffin furniture. The inner barrel runs partially through the suppressor but doesn't extend to the tip, giving you a great balance of extra barrel length with a duller muzzle report when fired.
Next up, we reach the handguard which is a perfect replica of the real steel Griffin SR (Suppressor Ready) handguard, boasting Griffin Armament trademarks and flawless machining throughout. M-LOK negative space attachment slots are available at the 3, 6, and 9 o'clock positions with extra slots at the offset angles, giving you extra versatility in where you place your M-LOK accessories.
The SR handguard is slightly wider in profile than most, designed to allow suppressors to be mounted inside while still providing full functionality of the M-LOK slots. Running along the top of the SR handguard, we have a 20mm Picatinny rail which mates seamlessly with the receiver rail, providing plenty of space for optical sights or other 20mm Picatinny accessories.
The receiver should be a familiar sight to anyone who has handled an M4/AR-15 platform before, constructed from alloy and matching an M4-style receiver perfectly. This includes the reinforced front pinhole, mil-spec flat trigger guard, magazine release fence and low profile charging handle latch. The magazine release is on the right side of the magazine well, a push-through design just like a standard M4/AR-15 AEG with a textured surface for optimal traction.
The controls are conventionally laid out for an M4/AR-15 replica, with the fire selector positioned just above the pistol grip on the left side, well within reach of the shooter's thumb when the rifle is held in a firing grip. The selector offers 3 modes in a SAFE-SEMI-AUTO layout with a 90-degree throw between each selector position.
At the top rear of the receiver, we can find the charging handle, and as mentioned, it features the milspec low-profile charging handle latch to reduce snagging potential. Pulling the charging handle back will open the dust cover and retract the mock bolt, revealing the alloy rotary HOP-up unit on the right side. The HOP-up allows you to adjust the amount of backspin applied to your projectiles and tune the MK1 M4SD for different ammo weights, looking for the flattest possible trajectory. When you've completed your adjustments, you can slap the "ping pong paddle" style bolt release catch on the left side of the receiver to drop the mock bolt with a satisfying metal-on-metal "clank".
The pistol grip is an A1 type, with checkering on both sides to provide a grippy surface and lacking the finger groove found on A2 grips, which some find less comfortable. The grip has a heat sink motor base plate, allowing the AEG's motor to cool between extended strings of fire. This is the only aspect in which the PTS MK1 M4SD deviates from the real steel, but it was necessary for optimal motor engagement with the gearbox, which wouldn't be possible with the more vertical Griffin "A3" grip used on the real steel.
At the rear, we have the prolific M4/AR-15 buffer tube, constructed from alloy and offering 6 adjustment positions for the pre-installed Griffin ECS™ stock. The adjustment lever of the stock is on the bottom; a low-profile design intended to reduce equipment snags, a considerable improvement over the older AR stock designs. A low-profile QD sling socket is present on either side in a unique "plate" format which considerably reduces weight. The butt plate is rubberised and serrated for optimal wet-weather traction, set at a slight angle to suit modern shooting stances and body armour users.
The battery compartment of the MK1 M4SD is inside the buffer tube, accessible with the stock removed. To achieve this, simply pull the adjustment lever outwards and slide the stock off the rear of the buffer tube. Inside, you'll find a Deans battery connector to which you mount your choice of battery. For the MK1 M4SD, we recommend a 7.4V 1450mAh LiPo in stick configuration for an easy fit and top-notch performance.
Inside, the MK1 M4SD is equipped with the common version 2 gearbox, meaning upgrade opportunities are practically unlimited for this beast. As you'll receive it, the gearbox is rocking 18:1 steel gears running on 8mm ball bearing bushings, a CNC aluminium double O-ring cylinder head, a stainless steel cylinder, a reinforced Nylon piston with an MIM steel tooth rack and an integrated MOSFET/ETU. The MOSFET is not programmable but does enhance trigger response significantly, along with preventing trigger lockups when shooting semi-auto at a rapid pace.
If you're a sneaky skirmisher seeking an up-to-date primary to match your playstyle, the PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG is one to watch. An impressive, high-end build on the outside with plenty of performance perks, the MK1 M4SD is ideal for realism-focused players who vibe with the M4SD look!
Features
- Full metal construction
- Licensed by Griffin Armament - Authentic trademarks across the design
- 6.03mm Tightbore inner barrel - Great accuracy potential
- 14mm CCW Male threaded outer barrel - Griffin GP5 Suppressor pre-installed
- ETU/MOSFET Pre-installed - Snappy trigger response, improved electrical efficiency
- PTS Griffin GP5 Suppressor - Detailed, licensed suppressor replica
- PTS Griffin SR M-LOK Handguard - Suppressor-ready handguard, M-LOK slots at 3, 6, 9 & offset angles
- 20mm Picatinny railed receiver - Ready for a red dot sight or scope
- PTS EP Trigger guard - Enlarged design, ideal for gloved shooters
- "A1" Pistol grip - The original M16A1/XM177 grip, a close match for the Griffin "A3" grip
- 6-Position M4/AR-15 buffer tube - Adjust the stock to suit your body type and loadout
- PTS Griffin ECS™ Extreme Condition Stock pre-installed - A perfect match for the real steel MK1 M4SD
- Version 2 Gearbox:
- Alloy shell
- 18:1 Steel gears
- 8mm Ball bearing bushings
- 36K High torque motor
- Quick-change ball-bearing spring guide
- CNC Aluminium double O-ring cylinder head
- Reinforced polymer pistol with MIM steel tooth rack
- Compatible with M4/AR-15 AEG magazines - PTS EPM Gen.2 Mid-caps recommended
Package Includes
- PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG
- 150rnd PTS EPM Mid-cap magazine
Specification
General
Weapon Type | Assault Rifle |
---|---|
Over 18 | Yes |
Defence / UKARA Required | Yes, No, |
FPS, using 0.20g BB | Approx.320fps ± 10%, using 0.20g BB |
Site Legal, using 0.20g BB | Yes |
Pre-Built | Yes |
Included Items | Magazine |
User 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. 2.436kg |
---|---|
Length (Collapsed) | 68cm |
Length (Extended) | 76cm |
Construction
Construction | CNC 6000 Series aluminium suppressor & handguard. Alloy outer barrel, receiver, buffer tube & trim parts. High density polymer pistol grip & stock. Steel body pins & receiver end plate. |
---|---|
External Construction | Polymer Alloy Aluminium Steel |
Internal Construction | Polymer Alloy Aluminium Steel |
Weapon Specific
Powered By | Electric |
---|---|
Blowback | None |
Weapon Platform | Assault Rifle, M4 / AR-15 / M16, M4/AR-15 AEG, |
Magazine Style | Long Gun Magazine, Assault Rifle, M4 / AR Platform, |
Fire Selector | Safe Semi Automatic Full Automatic |
Safety Features | Trigger Lock |
Shooter Configuration | Right Handed |
Weapon Configuration | Standard |
Weapon Scale | 1:1 |
Suggested BB Weight | 0.25g |
Hop-Up
Hop-Up Unit | Yes |
---|---|
Hop-Up Adjuster | Rotary |
Hop-Up Location | Behind the mock bolt carrier, accessible with the charging handle pulled and the mock bolt locked back. |
Furniture
Furniture |
|
---|---|
Rail System | 20mm RIS / RAS, 20mm Railed Receiver, M-LOK, |
Stock Setting | Sliding, Multi-Position, |
Stock Positions | 6 Position |
Sight Type | None |
Sling Options | Stock, QD, |
Barrel
Outer Barrel Length (in) | 9'', 6'', |
---|---|
Outer Barrel Thread Type | Male |
Outer Barrel Thread Direction | CCW (Counter Clockwise) |
Outer Barrel Thread Size | 14mm |
Inner Barrel Diameter | 6.03mm |
Inner Barrel Length | 330mm, 250mm, |
Magazine Specific
Magazine Type | AEG, Medium Capacity, |
---|---|
Magazine BB Capacity | Approx. 150 Rounds |
Magazine BB Fill Method | Speed Loader |
Magazine BB Fill Location | Top |
Electric Gun Specific Information
Gearbox
Gearbox Version | V2 Gearbox |
---|---|
Gearbox Wiring | Rear Wired |
Gearbox Quick Change Spring | Yes |
Gearbox Electronic Trigger | Yes |
Split Gearbox Design | No |
Motor
Motor Type | High Torque |
---|
Battery Specific
Battery Connector | Deans |
---|
Compatible Battery
Compatible Battery Type | Li-Po |
---|---|
Compatible Battery Configuration | Stick |
Compatible Battery Voltage | 7.4v |
Product Testing Data
Test Description | 320 FPS +/- 10% |
---|---|
Tested Using | 0.20g Delta Armory Diamond BBs |
Test Date | 12/05/2025 |
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 |