If it has something like "Range:40" like this one does, it DOES go in your range slot.
When something has RANGE listed in the SLOT field, then its an item that can go in the range item slot but cannot be used as a ranged attack.
A Word of Warning... if you have a range attack capable weapon in your range slot for stats, DON'T get charmed. Half the time, the first thing you do is throw your ranged weapon and its gone.