Help needed for Rigging weapons to the characters body

[zr1vetteowner]

How can I make a weapon wearable like a backpack or on the characters waist like the Spas 12 in CRI Squad in Fallout 3. I have come very close with blender but I'm not quite sure how to rig to the proper bones. When I try to equip, it floats in the air and far to the left of my character and I can't figure out why.