Im looking at getting the Tau Tigershark to take care of my Tau's lack of S

weaponry, while staying Tau, problem is, I can't find an accurate report whether it's S

or just regular rail guns with longer range.
Can anyone confirm this for me, I don't have access to the book or the unit, but don't want to have to order these from Forge world just to be disappointed. I tried googling it and stuff but it's all mixed with what I believe are old rules and new, but just want to confirm my assumptions.