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Modify Tremors II Recoil Action Kit for Front-Wired M4 Airsoft AEG Rifles

ID: 32700 (Kit-Mod-Tremors)
Modify859188327009MOD TREMOR KIT 2 (HP-01-01)32700
4.0 stars, based on 2 reviews
Modify Tremors II Recoil Action Kit for Front-Wired M4 Airsoft AEG Rifles
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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.


  • Patent No. M374045
  • Adds new recoil-like kick to your AEG
  • Compatible with most front-wired M4/M16 AEG rifles
  • Easy to install
  • Drop-in recoil assembly
The Modify TREMORS II M4 Recoil Action set is the perfect way to build a realistic feeling AEG to add more kick to the Version 2 gearbox system. Simply using a series of weights that will move back and forth in the buffer tube system, the kit will add a soft but noticeable kick while shooting in both full automatic and semi-automatic.

the TREMORS II M4 Recoil Action set comes with a new Spring guide, Piston head screw, and additional hammer, tube, end cap, and hammer guide to complete the kit to give your front-wired AEG a new feature!

Please note, the TREMORS II kit is compatible with front-wired M4/M16 AEGs only. Professional installation is recommended.

Manufacturer: Modify


Includes: Recoil Action/ Recoil Spring Guide/ Primary Screw/ Secondary Screw
Material: CNC Aluminum, Metal Alloy

2 Customer Reviews

(Write a review)

by Markus Z. on 08/13/2010
"Got the Tremors kit for my G&G GR16 R4. Intstallation was really easy and took about half an houre.

First shooting was with a 9,6v 3600mAh Batterypack and it was not really as good as i thought it would be. Than i tried my new 11,1v 2200mAh Lipo. Whit this the blowback was amazing. Have to say, that i use a Element torque motor in my G&G and in germany we are only allowed to shoot in semi.

Now i have shot nearly 500 BBs and it works fine.
by Dustin P. on 05/16/2010
"Siezed the motor in my brand new KWA SR10 and the battery started smoking after about 200 rounds.

Yes, I installed it correctly and checked and double checked clearences by moving the piston manually before firing.

Worked perfectly fine before the motor gave out. it does, however, give quite a nice kick, as advertized.

Note that in the installation videos, all they parts they use are made by modify. if your gearbox and pistion head are not Modify brand... you will most likely need a dremel tool OR a round metal file and a hacksaw at the very least. I had to widen the hole at the rear of the gearbox and cut the new screw you use to attatch the piston head to the piston down as it was too long for my KWA piston head.

Pros: It's totally awesome when u finally get to shoot it.

Cons: Most likely requires moderate to heavy modification to install.
Needs a high torque motor.
Adds quite a lot of weight to your gun.
The heavier your gun is, the less you will feel the recoil. As such, this probably works a lot better with plastic guns.

Warning: I would only recommend this if you have a dedicated high torque motor... and a good one at that. I assumed my KWA torque motor was "engineered to out perform" but... as of now, i'm shopping around for a new one.

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