The only other thing that would make sense to add as another weapon to it (on Vanilla at least) would be the knife, cause else there wouldnt really be much "assasins and assasinating people with silence weapons" over it any more. Unless you suggest a new fun round and call it Bounty Hunters which would basically be Assasins without any type of silenced Weapons.
a silent primary (if there is one) with only 1 mag (to prevent peeps from spraying everyone and being a HUGE lover) and knifes along with the silenced pistol would allow for tactics and strats to be played so +1