First of all, great work with this mod!

So, me and some friends are playing an antistasi version of the mod. All good so far but every hour or so we encounter a group of jaffa with personnal shields.
We did not find a way to defeat these guys other than running over them with a car repeatitly until they dont get up anymore. Even then it is not possible to kill them.

Is this a bug or are we missing some kind of weapon we need?