The M4 Custom from MGS4 is what inspired me to make the aeg. It is made of 60% G&P, 30% Matrix, 5% G&G, 5%Dboys. This is my favorite aeg to use. It is my lightest as well. I own a ACR by a&k and this is lighter than the acr. This what happens when you use high quality parts to make a extremly light and reliable aeg.