How do I setup my custom weapon?

Im using the Multiplayer Shootout example and I wanna figure out how to give him a custom gun and then how to rig it so its all scaled properly and he’ll hold it correctly. Thanks in advance. [EDIT] I tried searching through other threads, but none of them pertained to what i was exactly trying to achieve so if you guys have any advice please let me know or ir you could just point me in the right direction.