Rail weaponry punching through armor is a staple of the Tau's firepower in both game terms and fluff.



GW has gone into detail about how greatly Tau rail weaponry is despised by Space Marines. Chapter Apothecaries can't even reclaim the desired material from the fallen after hits from rail weaponry, as the velocity of the penetrating round uttery destroys the marine inside his armor. Such weapons kill both the target, and all future marines that could have been made from his gene-seed.



Now, when you factor the invulnerable save that all terminators have, it helps balance the playing field a bit. A bit. ^ ^;;



( I'm also quite sad about how weak Tyranid defenses are now. My Hive Tyrant misses his 2+ )