Sr1 Technologies

Howe & Howe Technologies (H&H, H and H, or HH) is an American private business headquartered in Waterboro, Maine that specializes in the development, manufacturing, fabrication and design of specialized armored and military-grade-spec vehicles, most notably the Ripsaw combat vehicle. Other products include the Badger, recognized as the world's smallest armored assault vehicle by Guinness World Records and the SR1, or Subterranean Rover 1. via Wikipedia ↗