xFlip

Is there any way to add new weapons into the game? I have not seen any mods covering this, just mods that replace guns. There are plenty of weapons I would like added. I can at some point supply a list and then anyone interested can add weapons I might have missed. If it's even possible to add new weapons without replacing existing weapons, I wouldn't mind learning the process of making and then implementing new weapons into the game. If anyone could help in any way that would be much appreciated.