T-051, also known as Mice, appears to be in different state. It was given the named 'Marauder', this vehicle appeared to be hijacked during the research in Project Blackwing's new world.
Marauders are the same as the normal T-051, but sturdier, bit of weight and are highly aggressive when contact. Best to avoid it or take it down before it gets to close or calls the others.

This T-051 (Marauder) was recovered after it was taken down by the T-088, stalling their vehicle. This vehicle tells us that it could be more of them out there, hijacked of ours, however let's give this vehicle a test drive and combat capability as a further side-task of understanding.

Semi-heavy type vehicle, Sturdy, dependent speed capability, excellent straightforward attacker.

Lore: 

Catalog #1 The beginning of Discovery
During the Project called 'The Blackwing* in 2087, a professor named Rev Moknoskiv and his other group of scientists started this after discovering that there was a gateway, a dimension to another world. A way to harvest resources that the Corp. requires large quantities for the military mass production as the earth starts to run out or used by others. Before entry, he send out a surveillance A.I and discovered unexpected yet terrifying result. The world fill with dust heavy storm and yes there were multiple of resources but they were not natural but manufactured vehicles and buildings. Does this new world the same as ours but corrupted and fallen civilisation? However the drone was lost, the last frames of footage was a vehicle with a heavy roaring mechanical sound. Although it was remain unidentified, Professor still insist to learn more about this new world, but this time with combat personnel. End of Catalog #1.