Panzerbushe 39 doesn't show hit markers at all when hitting enemies. Had a round on siege of tobruk and used both boys and pzb 39, but only boys seems to have hitmarkers and I definetly did hit stuff, since I killed both infantry and brencarriers with both AT rifles. Makes it pretty hard to hit anything, since I'm not too familiar with AT rifles and I can't know if I hit something, unless I kill it.