I have G2 Classic Pro and it is a fantastic c/a, but after two years (or three ) I have started to feel too much shots. Upper arms and shoulder area are two weak points. In game use it´s still a great unit, but in practises i get bruises almost always. Seam in that red circle is little too wide in Classic Pro and RGT Pro, in G4 there is a hard red foam and there is also some soft foam underneath in G2 pro.