Wich unit is that one? mines have the AK but are stand up (russian paratrooper AKS, both as an active unit or a static object, same with paratrooper rpg-16).
EDIT: ok I've setup a target and now are on their knees and shooting, and AK are correctly shown. Uninstall mods and try again. (I use latest Gys F15, simmod A-10 package by skypat 1.1 and Su-27, all separated mods not the 3 in 1 package).