Centurion
From Wiki Frakr
The Cylon Centurions are lethal walking chrome toasters created by man and implanted with monotheistic visions of some higher power. Their hands can unfold to be machine-guns, and they are tall and shiny. They have flashing red light to scare their enemies, and humans fear them, becouse they are bulletproof, and don't need uniforms to recognise eachother.
Centurions can be cute, as Baltar points out while he is kidnapped on board a damaged rebel basestar. But this option arises only if you unplug an USB-pendrive from their backs, as did the rebel cylons.