Repressor

The Repressor is an Infantry Fighting Vehicle employed by the Imperium of Man, especially the Sisters of Battle and the Adeptus Arbites. Like almost every vehicle in the Imperium, it is based on the Rhino chassis.

It was created as a super-crowd-control vehicle for the Adeptus Arbites -- the dozer blade is for clearing mobs and barricades, the built-in storm bolter turret can be loaded with stun or gas grenades (or plain old bolter shells, for when they need to put down heretics), and the crew compartment is extended to contain six firing slits, so they can shoot from relative safety.

One day, a massive riot proved too much for the Arbites, and they called on some nearby Sisters of Battle to help them. The Sisters fell in love with the Repressor (after adding a Heavy Flamer, because no self-respecting Sororitas would go into battle without any fire weapons), and after they convinced the other Orders that, yes, it really was holy, it has been a part of their armory ever since.

The Repressor model is produced by Forge World, one of their few gifts to the under-appreciated Sisters.