User blog comment:The Gunsmith/So, what weapons did you actually end up using?/@comment-4847632-20120418052920

I completed the single player on insanity as an Infiltrator. Mantis V + concentration + barrel / Chakram thrower + scope + barrel at the beginning switching to Widow  V + concentration + barrel / Paladin V + AP + barrel at the end. In multi-player I use the carnifex mostly and the geth pulse rifle as a backup for the engineer. If I play infiltrator I swap the carnifex with one of the snipers, usually the mantis since it's the most upgraded for me.