From Will Cometh Faith

Iron Warriors Vindicator closing in to target.
Vindicator is a self-propelled gun used by Space Marines both loyal and traitor. The Demolisher Cannon on it has a short range, but anything it hits is absolutely flakked. General rule in tabletop: "If your Vindicator hasn't absorbed at least 6 attempts to destroy it by Turn 2, you're doing it wrong or you have an allied Baneblade).
Also, those black-and-yellow diagonal stripes are generally associated with the Iron Warriors as well, but much less in DoW.