What are the most powerful gun on cod waw xbox360?

Well i can't say their is one but i will give you the really op guns:

DSR-50 its says 'hi i'm a wannabe sniper!' real badass snipers use the ballista.

scorpion EVO gets annoying because if you don't have an R870 MCS at close range your gonna die certainly.

Peacekeeper is a Hellraiser because i've been a sniper since cod3 and I know that an smg should not reach across the map like an mk48 and deal death as quickly as an m27.I mentioned I was a sniper since cod3 because i get pwnd by Hellraisers while I'm at least 45 meters away!