As much as I love using BF3 shotguns with slugs, I don't think it'll work in COD given it's map size.
Also I should point out that I've been banned from the admin numerous times for using shotguns with slugs in BF3 so I don't think BF community accept them. I doubt the COD community will be more accepted of them considering how much they complain about the R870 despite it having the shortest one shot kill range since COD4.
At the end of the day, I want shotguns to be good but at the same time balanced as I am a fair player.
@NoLifeKing29 Ah yes, forgot about the USAS-12 post launch patch. I'd say it did contend with the Striker but the pump actions and AA-12, oh god they were outclassed by those Striker and USAS-12.
I don't mind less shotguns as long as they're are all decent and I'm looking at MW2. Considering how I consider MW2 to be my least favourite COD title, the shotguns were just so damn good to use.