I only like the ranger out of all the shottys,I still cant decide which is the best Assult Rifle for me...atm i have the ACR with Holo sight and it seems to be good.
Talking about the Knifing Fatback.....i think the killing distance for knifes needs to be reduced...i mean you look at some of the kill cams and the enemy are no where near you its just rediculas....i know theres a perk for it but its way too much of an advantage imo....because like you said they just run around Knifing people,Especialy on smaller maps such as Scrapyard.
Im currently rank 61