The Mark II reactor drone was a heavily-shielded utility droid designed to perform menial labor duties. Their bulky, armored frames made these droids appear cumbersome.
- Star Wars radio drama (First appearance)
- Star Wars Encyclopedia
- The Essential Guide to Droids
- Arms & Equipment Guide
- The Official Star Wars Fact File 21 (AST2, P2 and R1 Astromech Droids)
- The New Essential Guide to Droids
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