Machadron

The machadron is a very resilient mechanimal species, transforming into squat armored tanks.

Fiction

IDW Generation 1 comics

Ultra Magnus, after using a shock grenade on Arcee, noted that it had "enough concussive clout to take down a raging machadron". Spotlight: Arcee

Beast Wars: Uprising

While using Black Omen's sensors to search Nyon Coliseum for Blackarachnia, he spotted a machadron in its tank mode. Broken Windshields