Modify sent in information about their new Tremors 2 Recoil Kit which is an improvement on their first release with a separate hammer and hammer guide with a guarantee of even more realistic recoil for your AEG. Photo above shows the original Tremors Kit installed with the full video right below the Tremors 2 information... "How are you recently? I hope that everything are going well with you. Here I would like to introduce you our Tremors 2 Recoil System for M4 Carbine. And here is the details:

If you are interested in above, please do not hesitate to contact us.

Best Regards,

Hanna Liao
Sales Assistant
Modify-Tech Co., Ltd."