Guarder Full Tune-Up Kit for AK47/74 AEG - M120

Code: FTK-27
  • Full gearbox tune-up kit
  • For AK47/74 AEG with Version.3 gearbox
  • M120 spring provided

The Guarder tune-up kit is intended for those building a gearbox from scratch, or those who want a smoother running gearbox in their AK47/74 AEG. The set includes an M120 main spring, bearing spring guide, polycarbonate piston, vented piston head, shims, 6mm steel bushings, air seal nozzle, enhanced tappet plate, steel gears, chromium-plated cylinder and stainless steel cylinder head. No longer do you have to mess around figuring out which parts work best with others, just throw this kit inside your gearbox and save yourself the compatibility worries!

Full description



  • Complete gearbox internals set
  • High grade components
  • Includes M120 spring (high power, suited to DMRs)
  • All of Guarder's best bits in one set!
  • For AK47/74 AEG with Version.3 Gearbox
  • Includes
      • Air Seal Nozzle
      • Polycarbonate Piston
      • 6mm Steel bushings
      • Teflon grease
      • Steel gearset
      • Chromium-plated cylinder
      • Stainless steel cylinder head
      • Vented Piston head
      • Enhanced tappet plate
      • Ball-bearing spring guide
      • SP120 Spring
      • Shim set

Package Includes

  • Guarder Full Tune-Up Kit for AK47/74 AEG - M120



Internal Part Type
Cylinder, Cylinder Head, Gears, Nozzle, Pistons, Shims, Spring, Spring Guide, Tappet Plate, Bushings, Piston Head,

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.313kg

Part Specific

Part for Power Source Type
Weapon Platform
  • AK Platform
  • Long Gun
Package Includes
  • Gearbox Parts
  • Spring Guide
  • Gears
  • Piston
  • Cylinder
  • Grease
  • Main Spring
  • Shim Set
  • Cylinder Head
  • Nozzle
  • Piston Head
  • 6mm Bushings

Electric Part Specific

Gearbox Icon
Gearbox Version
V3 Gearbox
Gearbox Version Compatibility Variant
Version 3

Spring Specific

Spring Manafacturer Power Rating
Approx. M-120
Spring Approximate M/S
Approx. 120m/s, using 0.20g BB
Spring Approximate FPS
Approx. 393fps, using 0.20g BB

Bearing Specific

Spring Guide Bearings

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.

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