The Lockwood Mk2 is a powerful and punishing Marksman Rifle in Call Of Duty: Modern Warfare 2, which takes Sniper Rifles' ability to one-shot-kill at most ranges and wraps it up in a much more lightweight package.
I normally don't care about people who use shotguns because I use them too. But holy hell this weapon build that everyone is using is absurdly overpowered.