Specna Arms Gearbox V2 Shell for AR-15 Specna Arms CORE™ Replicas

Specna Arms
Code: SPE-08-027529
Was £19.99
Save £5.00
  • Specna CORE™ Gearbox shell
  • Radiused Cylinder window
  • 8mm Bushings included

The Spenca CORE™ V2 Gearbox Shell provides 8mm bushings, radiused cylinder windows to help prevent cracks, and quick release spring functionality. Perfect for starting your ultimate gearbox build! 

Full description


The CORE™ V2 Gearbox shell from Specna Arms is designed for M4/AR-15 AEG replicas but is also the correct shell to use for an AEG SMG-5/MP-5 gearbox build. This shell includes 8mm bearings, and features radiused corners on the cylinder window, fixing a common weak point in AEG gearboxes which rears its ugly head when using high powered springs. The rear of the gearbox is open for the use of a quick-change spring guide, allowing you to change your spring without having to open the gearbox itself, saving you the heartache of dealing with a potential spring loaded gear grenade if your hand slips!


  • V2 Gearbox
  • Radiused Cylinder window corners
  • Quick change spring guide compatible
  • 8mm Bushings included

Package Includes

  • Gearbox V2 Shell for AR-15 Specna Arms CORE™ Replicas



Internal Part Type
Gearbox Shell
Patrol Base - Warning Icon
This gearbox shell will require a Specna Arms quick change spring guide and is not compatible with standard spring guides

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 3.25kg


Colour Wheel Greyscale
Item Colour
Construction Icon
Internal Part Construction

Part Specific

Part for Power Source Type
Weapon Platform
  • AR Platform
  • M4 / AR-15 / M16
  • Long Gun
  • Assault Rifle
Package Includes
  • Gearbox Parts
  • Shell
  • 8mm Bushings

Electric Part Specific

Gearbox Icon
Gearbox Version
V2 Gearbox
Gearbox Version Compatibility Variant
Version 2

Size guide

Parts Fitting

Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff. 

Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.

We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!

Unique Parts

Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.

Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.

If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.