Thanks to Gregory for the link!
Small arms fire against Vehicle Borne IEDs. It just doesn't work. I've long thought that the answer is to add some type of modernized "bullet catch" rifle grenade launcher (not sure the name is right). That is capable of being
shoulder fired, yet has enough velocity and "umph" to stop most passenger cars and light trucks from being effective. You would think with Marine Corps experience in the Middle East we would have developed a means for an individual Marine to stop this threat, but I digress.
God bless the Russian Marine that died in combat. We're on different sides but I can respect his professionalism, his willingness to do the hard thing and the fact that he was killing terrorists (his story is here).