AEG Power Upgrade - Install M120, Stainless Bushing, Shimming & Basic Tuning


Model: UP-AEG-M120
This item is MAP controlled
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping. Click here for details.

1 Customer Review

by Michael L. on 02/24/2015
"I bought this upgrade with an Echo 1 AK700 and I am very happy with the service I received and performance I am getting from this gun. Firstly, the work was done three days after placing my order....much faster than I expected. Secondly, the gearbox runs very smoothly so the shim job was outstanding. Thirdly, with the M120 spring I chrono'd the gun at 425 fps with 0.25 gram BBs. Thanks, Evike.

AEG Power Upgrade - Install M120, Stainless Bushing, Shimming & Basic Tuning

This service is for the installation of an M120 rated spring, reinforced steel bushings, and shims to an Airsoft Electric Gun metal gearbox.
The service will also include basic tuning and testing of the gearbox with the newly installed spring for proper alignment and smooth operation.

Package Includes: M120 Spring, Reinforced Steel Bushings, Shims
FPS: 380-420 FPS based on standard factory tuned gearboxes. FPS range may vary pending other upgrades/parts/gun.
Compatibility: This upgrade service is suitable for Tokyo Marui, G&G, ICS, JG, Echo1, Cyma, DBOY, Classic Army, Matrix, Kart, G&P, King Arms, Star, KWA and other compatible AEG models (Excluding PSG-1).
For unique/uncommon guns, please contact us via phone or email with the make and model of the gun you wish to upgrade and we can verify for you if this upgrade will be suitable for your gun.

Service Contract:

  • All upgrade services purchased with brand new Airsoft gun(s) will be completed prior to shipping your order. Please allow 1-5 additional business days for completion of upgrade services.
  • will guarantee proper installation and proper testing of your requested upgrades.
  • warranties the completed upgrade service for 45 days from the day your gun is delivered to you. We are here to help. Please let us know right away if you experience any issues or have any concerns regarding the completed upgrade work.
  • Extreme upgrades that can result in increased wear/risk of damage to the gearbox such as power upgrades over M130 spring rating, rate of fire upgrades over 20 RPS, or upgrades beyond technician recommendations cannot be covered under warranty.
  • In the event that the service selected cannot be completed on the selected Airsoft gun(s), an technician will contact you to discuss any other possible upgrade options or to refund you for the ordered service.
  • Rest assured that your upgrade service will be completed by some of the best and most experienced Airsoft technicians in the industry backed by the most extensive selection of OEM and aftermarket parts.
  • The service warranty covers the repair pertaining to the original upgrade request and related work. The warranty does not cover extra/misc. parts or modifications, maintenance, or performance variations resulting from adjustment of hopup. Warranty is void if the product is altered, disassembled, misused, or is outside of the warranty coverage period. Warranty does not cover anything that is not listed in the section above.
  • Please note, proper maintenance will be required following any completed upgrade to an Airsoft gun. It is normal to experience increased rate of wear on high use parts following a performance upgrade.
This product was added to our catalog on Tuesday 01 January, 2008.

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