The Panther is one of the non rotating barrel enemies in Rail Of War. However it is very fast so it easily aims to fire. It also shares stats with the Abraham's tank but has the strongest tank cannon in the game.
A non rotating barrel is the only disadvantage. That way it's slow in aiming, but once aimed it's lethal(Game Instructions).
It is based on the World War 2 German tank destroyer Jagdpanzer V (Jagdpanther) in real life.