Secutor ASTRA IV Shadow AEG

Code:
£399.99
  • Full metal construction
  • Ares EFCS Gearbox - Programmable
  • High torque motor - Snappy trigger

If you're in search of a stylish M4/AR-15 AEG and want a modern look, the Sector ASTRA IV Shadow M4 AEG is an excellent choice. This full-metal M4 platform is inspired by the latest AR platforms in the real steel world, boasting a uniquely designed receiver with a waffle-gripping texture, an M-LOK handguard, and a low-profile stock. It also features ambidextrous controls, making it perfect for all skirmishers!

Inside, we are equipped with a version 2 gearbox featuring 18:1 steel gears, a quick-change spring system, and the Ares EFCS MOSFET. This setup provides programmable fire controls via an Ares EFCS programming box (not included) and a low-voltage cutoff to protect your battery. It improves electrical efficiency and pairs perfectly with the pre-installed high-torque motor to provide a snappy trigger response in semi-auto, ideal for pumping out the suppressive fire. If you want a modern-looking rifle with a solid performance, the Secutor ASTRA IV Shadow M4 AEG is a superb option!

Full description

Description

This rifle looks incredible! Its cool design matches modern rifle designs with features like a waffle magwell, fabric handguard shroud and low-profile adjustable stock. Plus, it's great for Airsoft too, with its preinstalled EFCS MOSFET/ETU. Using the Ares EFCS programming box (not included), you can control and programme your replica in a variety of ways that are sure to take your gameplay to a whole new level.

Starting at the front, we can find a pre-installed suppressor, which provides the ASTRA III with a sneaky style. The outer barrel is constructed from alloy and has 14mm CW threading at the tip. For other muzzle devices, you'll need a 14mm CW to 14mm CCW adapter to mount the most common tracer units, suppressors and alternative flash hiders. Please note, the inner barrel goes all the way to the tip of the suppressor, so a barrel extension will be needed for shorter muzzle devices.

Immediately behind the steel muzzle device, we come to the aluminium handguard, measuring 9 inches in total length. The handguard boasts M-LOK negative space attachment slots at the 3, 6 and 9 o'clock positions with a 20mm Picatinny rail up top, ready for a PEQ laser, tactical flashlight or anything else you need to mount to complete the mission at hand.

The upper 20mm Picatinny rail runs back to meet the receiver rail seamlessly, allowing for optical sights of practically any length to be mounted. Also present on the handguard are a pair of non-functional QD sling sockets, purely there for aesthetic purposes, and they bear no actual function or use.

On the top rail, we are treated to a set of flip-up aperture iron sights which can be deployed by hand, and are fully adjustable for both windage and elevation. The rear sight is equipped with two apertures for aiming in different environments; one with a wide hole for low-light situations and full auto, and a second with a smaller aperture for semi-automatic fire in good lighting conditions.

Following that, we come to the receiver, boasting a unique Ares design. It features a waffle texture on the magazine well to provide extra grip and a dummy forward assist for extra realism points. The dust cover, found on the right side, is constructed from high-density polymer to match modern weight-reduced dust covers found on the latest modern assault rifles, such as the Daniel Defense's DDMK18.

The charging handle is located at the top rear of the receiver and is a low-profile design to reduce snagging and improve battlefield agility. Pulling the charging handle back will pop open the dust cover and lock the mock bolt carrier to the rear, allowing access to the rotary HOP-up unit. The HOP-up allows you to tune the ASTRA IV for your chosen BB weight. Once your adjustment is complete, slap the "ping pong paddle" bolt catch on the left side or the secondary bolt catch on the right side to send the mock bolt home with a satisfying "clank".

The fire selector switch is ambidextrous, located on both sides of the receiver, just above the pistol grip, ideal for all shooters. The selector provides 3 modes of fire: safe, semi-automatic and fully automatic, with a 90-degree throw between each mode. Being equipped with the Ares EFCS, the fire controls of the ASTRA IV Shadow can also be programmed for burst mode and semi-auto only using the Ares EFCS programming box (available separately).

The magazine release button is also ambidextrous, positioned on the left and right sides of the magazine well. The mag release works just like a standard M4/AR-15 push-button release. The buttons are surrounded by raised protrusions in the receiver, known as the "magazine release fence". This is so the mag release can't accidentally be pressed as the ASTRA IV Shadow rubs against your gear.

The pistol grip of the ASTRA IV Shadow boasts an ergonomic grip angle for greater comfort when shooting with the stock fully collapsed and in more modern shooting stances. It features rough texturing on all sides for perfect wet-weather handling. The trigger guard is built into the receiver to improve strength and is enlarged to allow for gloved users. The trigger offers a flat serrated front surface with a short finger ledge, ideal for rapid double taps.

Following the receiver, we reach the AR buffer tube. It is constructed from a strong alloy and provides 5 positions of adjustment, enough to suit any body type or loadout. To adjust the stock position, press up on the lever located at the bottom of the stock and then slide the stock to your desired position.

The stock is constructed from high-density polymer and features an angled butt plate, which provides comfort and security when wearing full-body gear and operating from modern shooting stances. The buffer tube system allows you to swap your stock out for any aftermarket M4/AR-15 stock simply and quickly. If you fancy a change or get tired of its looks in the future, the option to switch out the stock means you have access to the widest variety of aftermarket stock options out there!

At the rear of the stock, we are treated to a QD sling point on both sides of the stock. This allows you to attach a sling to either side of your rifle, depending on your shooting style. It also has a slightly raised cheek pad comprised of slightly smoother polymer than the rest of the stock for improved comfort. The butt plate is also polymer and is textured for good grip, ensuring that the stock stays firmly in your shoulder when shooting

The battery compartment is located within the buffer tube and can be accessed by removing the stock. To do this, pull the two tabs on either side of the front of the stock. Once pulled down, the polymer stock can slide off the buffer tube, and you can access the Deans style connector. We recommend a 7.4v 1300mAh 25C LiPo Stick Battery for a comfortable fit in the buffer tube.

Inside, the ASTRA IV Shadow is equipped with the Ares EFCS gearbox, including the EFCS programmable MOSFET, 18:1 ratio steel gears and a quick-change spring system for easy power tuning. The gearbox itself is based on the venerable version 2, though we suggest consulting a tech before buying upgrade parts, as some bits inside are proprietary. The pre-installed motor is a high-torque example, providing a snappy trigger response ideal for exchanging fire in CQB settings.

The EFCS MOSFET allows the fire modes to be reprogrammed for burst modes and semi-auto only using the Ares EFCS programmer (available separately) and also features a low-voltage cutoff function, protecting your battery from being damaged if the voltage drops too low.

Overall, this rifle is a do-it-all kind of platform, perfect for indoors and outdoors, thanks to its size. Its tactical modern style will definitely be appreciated on the battlefield, and the inclusion of a modular foregrip is incredible! Not to forget the EFCS gearbox, with its programmable MOSFET and premium internals, you're sure to have a whole lot of fun with this AEG!

Features

  • Full metal construction - Realistic, weighty feel
  • Preinstalled suppressor - Inner barrel reaches the tip, barrel extension needed for alternative devices
  • 14mm CW male threaded barrel - Compatible with 14mm CW accessories, add an adapter for CCW
  • M-LOK Handguard - M-LOK slots at 3, 6 & 9 o'clock, 20mm Picatinny up top
  • Modular M-LOK foregrip included - Change the size to match your playstyle
  • Pre-installed flip-up iron sights - Great for backup
  • 20mm Picatinny railed receiver - Ready for a red dot sight or scope 
  • Waffle-textured lower receiver - Great for extra grip when using the "magwell hold"
  • Ambidextrous fire selector switch - Ideal for left or right-handed shooters
  • Ambidextrous magazine release - Release the mag from the left or right
  • Ambidextrous bolt release catch - Drop the bolt from either side after HOP-up adjustment
  • Rotary adjustable HOP-up unit - The latest design for M4/AR-15, holds settings well under vibration
  • Textured pistol grip - Great for all weathers
  • Sling loop at the toe of the stock
  • QD Sling points - On both sides of the stock
  • High torque motor - Snappy response thanks to extra torque
  • Ares EFCS version 2 gearbox:
    • 18:1 Ratio steel gears
    • EFCS MOSFET - Programmed using Ares EFCS programmer (available separately) 
    • Quick-change spring system
  • Rear wired: Deans battery connector - Recommended battery: 7.4v 1300mAh 25C LiPo Stick Battery
  • Compatible with M4/AR-15 AEG magazines - Plenty of spares available

Package Includes

  • Secutor ASTRA IV Shadow AEG
  • Modular Foregrip
  • 120rnd 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.330fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
  • Magazine
  • Modular Foregrip
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. 2.57kg
Weapon Length Collapsed
Length (Collapsed)
76cm
Weapon Length Extended
Length (Extended)
85cm

Construction

Colour Wheel Greyscale
Primary Colour
Black
Construction Icon
Construction
Steel screws, pins, gas tube and castle nut. Aluminium handguard. Alloy outer barrel, receiver and buffer tube. Polymer stock, iron sights and pistol grip. Rubber butt 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, AR,
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
Programmable with Ares Programmer (available separately)
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Ambidextrous
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 mock bolt carrier, accessible when the charging handle is pulled and the mock bolt is locked to the rear.

Furniture

Weapon Furniture Icon
Furniture
  • Railed Handguard
  • Ambidextrous Charging Handle
  • Railed Receiver
  • Ambidextrous Magazine Release
  • Ambidextrous Fire Selector
  • Ambidextrous Bolt Release
  • Ergonomic Pistol Grip
  • Sliding Stock
  • Flip-Up Ironsights
  • 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
5 Position
Sight Type Icon
Sight Type
Iron Sights, Aperture Iron Sight,
Sling Plate Icon
Sling Options
Stock, QD, Loop,

Barrel

Outer Barrel Length (in)
9''
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CW (Clockwise)
Outer Barrel Thread Size
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
Inner Barrel Diameter
6.03mm
Inner Barrel Length
Inner Barrel Length
370mm

Magazine Specific

Magazine Type
Magazine Type
AEG, Medium Capacity,
Magazine BB Capacity
Magazine BB Capacity
Approx. 120 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
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
330 FPS +/- 10%
Notepad Icon
Tested Using
Delta Armory 0.20g EAGLE™ BBs
Notepad Icon
Test Date
09/09/2025

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