It was nerfed to death. I should have used it more when the game released.
I use it sometimes still (when the enemy team is filled with tryhards), and it still destroys people. Only part I hated was long range kills.
Sawed off barrel, sawed off stock/No stock, choke, sleight of hand, I think. Don't remember what 5th one I use. I'll look when I get home from work.