The same as a xbow?
Bullet speed is the same as bolt speed?
Bullet trajectory? Guns can shoot far away than xbow.
I play MandMusket, i can tell you that the guns in this mod don't behave as xbows.
But you're right about historical accuracy, that's bs, Calradia doesn't exist so no history at all...
In terms of balance, and fps like, sorry but guns will change the mod. First everybody will buy one, some will stack 3 guns (and hide camping), and how to balance that new weapon? It would be stronger than any ranged weapon (that's why we don't use xbow and bows anymore).
About low accuracy : it's bs, you don't need accuracy at point blank, "bang" you're dead. And what will you do when a clan (a smart one) will start to shoot in volley? 10 or 15 guns shooting in the same direction don't realy need accuracy, then we will see a new style of battles, but nothing related to cRPG.