ASG CAA M4 Assault Rifle w/ 20mm Handguard

From £299.99
  • Adjustable Stock
  • Ergonomic Pistol Grip
  • 20mm RIS Rail Handguard

A high quality M4 Airsoft electric gun that's bursting with 20mm RIS real estate for accessories! With quad 20mm RIS rails on the handguard and a full length upper rail, this AEG is ideal for Airsofters looking for an M4 that they can customise with a variety of accessories. 

Full description


Straight from the box this AEG M4 is ready for Airsofters to customise into a lean, mean, room clearing tactical machine. There's enough 20mm RIS real estate on this M4 to keep even the biggest weapon accessories fans happy, allowing you to deck out your Airsoft gun with whatever equipment and accessories you need. A full length 20mm rail allows the installation of optics and scopes to enhance your ability to acquire, identify and engage targets in the field, however the gun is supplied with a set of low profile flip-up ironsights which are easy to use. The alloy handguard features four 20mm RIS rails, ensuring that you'll be able to deck out your M4 with whatever equipment you deem necessary, from foregrips and flashlights, to Airsoft grenade launchers. ASG have improved the ergonomics of this M4 by using an ergonomic pistol grip, which uses molded finger grooves to give users a comfortable and stable grip over their M4. The stock is a multi-position sliding design, allowing users to adjust the length of the Airsoft gun to a position which is comfortable for them. The buttpad features a textured and patterned surface, designed to enhance the user's grip on the M4 to maintain a steady aim. Removing the buttpad grants access to the M4's battery compartment. The M4 is supplied with a modern lightweight polymer bodied high capacity magazine, has both raised ridges and textured surfaces to improve grip. This M4 AEG is an excellent platform for any Airsofter wanting to create a dynamic and tactical Airsoft gun, combining practicality with adaptability. 


  • Ergonomic pistol grip 
  • Quad 20mm RIS rail handguard
  • Full length upper 20mm rail
  • Low profile flip-up iron sights
  • Multi-position adjustable sliding stock
  • Rear-wired design 
  • Plenty of 20mm real-estate for accessories
  • 14mm CCW flash hider
  • Compensator style flash hider
  • Tried and tested M4 controls 
  • Polymer bodied magazine

Package Includes:

  • CAA M4 Assault Rifle w/ 20mm Handguard
  • High Capacity Magazine 



Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
Site Legal Icon
Site Legal, using 0.20g BB
Included Items
  • Magazine
  • Ironsight Set
Skill Level Icon
User Skill Level


Colour Wheel Greyscale
Primary Colour
Black, Tan , Dark Earth,
Two Tone Icon
Pre Two-Toned
Weapon Construction External
External Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
M4 / AR15 / M16
Magazine Style Icon
Magazine Style
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale


Hop-Up Unit Icon
Hop-Up Unit


Weapon Furniture Icon
  • Flip-Up Ironsights
  • Finger Ridged Pistol Grip
  • Ergonomic Pistol Grip
Weapon Furniture Icon
Variant Furniture
Flash Hider
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Sliding , Multi-Position ,
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights


Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size

Magazine Specific

Magazine Type
High Capacity, Wheel Wound, AEG,
Magazine BB Fill Method
Fill Window
Magazine BB Fill Location

Electric Gun Specific Information

Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Rear Wired
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya

Product Testing Data

Notepad Icon
Test Description

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