I'm starting with adding weapons to the UFPS Kit

I decided to start at adding the weapons I will need for the space/mech parts of the game. I will have to wait for the multiplayer to add the mech/ship/character models but I also have the weapon models to use now.
The UI's will be next But for now I will start with just adding weapons. I see how to add the character weapons but would like some guidance on add duel weapons. For the FP view I will use the same models I got in this pack as my mech and space weapons. 
http://3drt.com/store/characters/sci-fi-characters/mech-robots-megapack.html

The mechs weapons will be more in view and the space ships further apart and further back from view.