Modify Tremors 2 M4 Recoil Action Set

Code: MOD-HP-01-01
  • Big Recoil Kit
  • V2 Gearbox Use
  • CNC Machined Parts

Time to convert your old boring Version 2 Airsoft rifle into a heavy recoil monster. CNC machined alloy kit includes everything to slide into your buffer tube and replaces your spring guide too for full recoil support.

Full description


Designed for an Airsoft Version 2 gearbox only, the kit consists of a spring guide replacement which secures all of the buffer tube components including a very heavy duty recoil spring setup and a near 190g recoil weight! Some serious heft to give a very satisfying shunt into your shoulder on each shot.

Be warned though! You must run an upgraded gear set, piston and ideally a reinforced gearbox casing to avoid any disappointment after the first few shots. This kit is not for the fainthearted, technical knowledge and patience is required for fine tuning of other gearbox components to avoid premature wear and failure of your build.

Check out the video below showing a basic installation guide. Buffer tube modification and battery storage mods may also be required when fitting this kit.

Product Features:

  • Version 2 gearbox compatible only
  • CNC machined steel quality
  • 185g recoil weight
  • Reinforced spring guide
  • RIF must have Buffer Tube

Package Includes:

  • 185g recoil weight
  • Reinforced spring guide
  • Orange recoil sleeve
  • Primary and secondary assembly screw
  • Heavyweight recoil spring



Internal Part Type
Pistons, Spring Guide,
Patrol Base - Warning Icon
Patrol Base - Warning Icon
Parts Fitting

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.45kg


Colour Wheel Greyscale
Item Colour
Construction Icon
Internal Part Construction

Part Specific

Part for Power Source Type
Weapon Platform
M4 / AR15 / M16
Package Includes
  • Spring Guide
  • Recoil Weight
  • Recoil Spring

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.