Spartan assassin's were spartans that did ONI's dirty work, many of these spartans were sent on missions alone or with other special forces. Spartan assassin's had many weapons at their disposal, the spartan assassin above is equipped with an enhanced sniper rifle and a M6S magnum, other weapons these spartans would use would vary depending on their mission. Along with knowing their weapons they also had to be experienced in many different fighting forms and before every mission they were expected to research everything about their target whether it be covenant, or one of their own.