Bows, no.
Rifles, no.
Crossbows, no.
But, it's not entirely unfeasible to simply add a one-handed class for these
weapons, ie. Pistol and Mini-Crossbow, obviously you couldn't add a
one-handed bow, as that requires one to hold both shaft and string.
And, I would presume if such were in-game, these weapons would probably
be putting emphasis on speed over damage.
And hand guns, can, and sometimes are used for hunting in situations where
a full sized rifle would be impractical, aswell as simply for the
challenge of using one over a rifle.
And as for aesthetics...well, I've seen Mr.Woo's name come in a similar topic
(You must really like his work ^^) but, I can say I don't get that vibe,
it's more of a Steampunkish feeling for me, or as has been mentioned Cowboys
etc. a slight bit.