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Shrike

shrike - a large bird that impales it's prey on thorns.

This is a robot made for destructive competition. It's in the Lightweight Class (50 pounds) and is a weapons platform as opposed to a ramming machine. 

     
battlebots.com
delphi.com/battlebots - The forum on the web to learn about combat robots 
teamdelta.com
SORC.org (Society of Robotic Combat)