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ICS M4A1 Proline Airsoft Gun

  • The ICS M4A1 Full Metal AEG
  • Showing the lower portion of the gearbox
  • The ICS split gearbox design allows easy repairs and upgrades



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Fox airsoft offers a 30 day warranty and return policy.


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Product Description

About the ICS M4A1 Proline AEG 

The ICS M4A1 Metal Body Electric Airsoft Gun is a high quality Airsoft gun that offers the user flexibility to upgrade easily and quickly.

With its unique split gearbox design, the ICS allows you to remove the rear receiver lock pin and quickly slide out the upper portion of the gearbox that contains the piston and cylinder of the gun. The advantages of this are notable. The user can obtain a second upper gearbox that is build for a lower FPS. One upper can be built for outdoor play where 400FPS is desired while the other upper can be built for indoor use where 350FPS is required. This exchange can be done in less than a minute. Another advantage is the ability to exchange uppers in the event that you experience an issue, such as a piston failure, on the field. Within seconds you can exchange gearbox uppers and be back in action! Another unique feature on the ICS is a anti-reversal latch release built into the forward assist located on the right side of the receiver. This allows you to decompress the main spring in the gearbox when you are done using it for the day. This is also an advantage for anyone running a DMR (Designated Marksman Rifle). A typical DMR setup might be running 450FPS and have full auto disabled. If the user experiences gearbox lockup that semi only guns are more prone to, simply push the release button and the gearbox will be reset to the neutral position. The large majority of the gearbox internals are standard version 2 compatible so upgrade parts availability is great.

Overall the ICS M4A1 is a solid, well engineered AEG with features not usually found on most Airsoft guns. 

Quick Overview 

  • Metal Body and Barrel
  • Collapsible LE-Style Stock
  • Split Gearbox Design
  • Solid Polymer Furniture
  • Battery Housed in Handguard
  • Shoots 360 - 380 FPS out of the box

Technical Specifications 

  • Model Number: ICS M4A1 Proline AEG
  • Muzzle Velocity: 360 - 380 FPS with .20 gram BBs
  • Color: All Black
  • 363mm Inner Barrel Length
  • Version 2 Split Gearbox
  • Long Type Motor
  • Working fire selector
  • Front sling mount point on front sight
  • Rear sling mount point on stock
  • Fixed Front Sight
  • Removable Rail Mounted Rear Sight
  • Battery Connector is a mini type Tamiya connector
  • Compatible Sling Types: 2 Point

Weight & Dimensions 

  • Dry weight of the gun without magazine or battery is 6 lbs 6 oz
  • Weight of the gun with battery and without magazine is 6 lbs 12 oz
  • Weight of the gun with battery and with magazine is 7 lbs 1 oz
  • Entire Package Weight is 8 lbs 0 oz
  • Gun Length (Stock Extended): 35 inches (890 Millimeters)
  • Gun Length (Stock Collapsed 32.5 inches (825 Millimeters)
  • Package Dimensions 39 inches x 12 inches x 4 inches
  • Recommended Gun Bag Size: 36 inches
  • Recommended Maximum Battery Voltage: 11.1 volts


Fox Airsoft offers a 30 day warranty and return policy which you can read more about here

Alternate Lookup: ICS M4, ICS Proline, ICS AEG, ICS Metal Body 

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