My suggestion: think of what weapon best fits him first. Is he an agressive, best offensive is best defensive type or more less likely to want to kill anyone. Then think of good ways to hide that weapon in plain sight. Samad has a blade in his cane, a plasma variety, and due to his 'limp' looks like he requires it to help him walk. Cade has a bo staff since they are considered non lethal and fits his personality. It's able to merely look like a cylinder size paper weight or hidden completely out of sight.