Razorback
The razorback is a tracked vehicle based on the Rhino. His building techniques . His STC was lost during the Age of Strife but found again in M36 by the Chief Artisan Tilius. Because it was found after the Horus heresy Chaos Space marines don't use it. It was created to give a transport with a little more firepower than the original Rhino It can be fitted either with a twin heavy Bolteror twin lascannon or a multi meltagun and carries 6 Space Marines in power armour