Arvus Lighter

The Arvus Lighter is a small, general purpose cargo shuttle that is widely used by the Imperium of Man for many tasks, both in space and on the surface of planets. The Arvus is commonly used by both Imperial Navy warships and Imperial merchant vessels, including Rogue Traders. The Arvus is just one of many types of small, void-capable shuttles used by the Imperium. The Arvus is piloted by a single pilot, and is not equipped with any weapon systems, in fact, the Arvus possesses only the most basic navigation equipment, external sensors, and proximity alarms. The Arvus has a powerful engine that allows it to carry heavy cargo to and from a planet's surface.

TL;DR: "This shuttle suuuuuuuucks and carries things, and almost never has weapons".