Should all weapons be FAS weapons?

Currently the regular weapons in the game feel pretty good, but FAS weapons are simply amazing. Not only can you add attachments, but the weapons can shoot through walls and they just look and feel amazing. With the added perk of using the same weapon means you get bonus stats really helps with rping, such as if you are a hitman that loves to snipe. I personally think that all of the weapon dealers besides just the black market should have access to the weapons.

But m9k is smexy!  

But Fas makes m9k look like a fugly step child