PTS Syndicate Griffin Armament MK1 M4SD M4/AR-15 AEG

PTS Syndicate
Code:
£309.99
  • 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!

Full description

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 Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Yes
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS, using 0.20g BB
Approx.320fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
Magazine
Skill Level Icon
User Skill Level
Regular Player
Patrol Base - Warning Icon
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 Icon
Weight (KG)
Approx. 2.436kg
Weapon Length Collapsed
Length (Collapsed)
68cm
Weapon Length Extended
Length (Extended)
76cm

Construction

Construction Icon
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.
Weapon Construction External
External Construction
Polymer
Alloy
Aluminium
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
Electric
Blowback Icon
Blowback
None
Weapon Platform
Weapon Platform
Assault Rifle, M4 / AR-15 / M16, M4/AR-15 AEG,
Magazine Style Icon
Magazine Style
Long Gun Magazine, Assault Rifle, M4 / AR Platform,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
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
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Rotary
Hop-Up Unit Location Icon
Hop-Up Location
Behind the mock bolt carrier, accessible with the charging handle pulled and the mock bolt locked back.

Furniture

Weapon Furniture Icon
Furniture
  • Integrated Suppressor
  • Railed Receiver
  • Textured Pistol Grip
  • AR Buffer Tube
  • Sliding Stock
  • Threaded Outer Barrel
  • QD Sling Point
  • Enlarged Trigger Guard
  • M-LOK Handguard
Rail System Icon
Rail System
20mm RIS / RAS, 20mm Railed Receiver, M-LOK,
Icon Stock Positions
Stock Setting
Sliding, Multi-Position,
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
None
Sling Plate Icon
Sling Options
Stock, QD,

Barrel

Outer Barrel Length (in)
9'', 6'',
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
Inner Barrel Diameter
6.03mm
Inner Barrel Length
Inner Barrel Length
330mm, 250mm,

Magazine Specific

Magazine Type
Magazine Type
AEG, Medium Capacity,
Magazine BB Capacity
Magazine BB Capacity
Approx. 150 Rounds
Magazine BB Fill Method
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Magazine BB Fill Location
Top

Electric Gun Specific Information

Gearbox
Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Yes
Digital Trigger Icon
Gearbox Electronic Trigger
Yes
Split Gearbox Icon
Split Gearbox Design
No
Motor
Airsoft Motor Icon
Motor Type
High Torque
Battery Specific
Battery Connector
Battery Connector
Patrol Base | Icon | Deans
Deans
Compatible Battery
Compatible Battery Type
Compatible Battery Type
Li-Po
Compatible Battery Configuration
Compatible Battery Configuration
Stick
Compatible Battery Voltage
Compatible Battery Voltage
7.4v

Product Testing Data

Notepad Icon
Test Description
320 FPS +/- 10%
Notepad Icon
Tested Using
0.20g Delta Armory Diamond BBs
Notepad Icon
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.

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