I have read that you can equip NPC's in on the PS4 version of Fallout 4 by hovering over the item on their trade screen and pressing triangle. This does not appear to be an option for me, as it just doesn't show this option and I have tried MANY different items.
Is it something I need to unlock or just another bug on Bethesda's part?
Best Answer
It should work for any NPC that you have control over (read: access their inventory). That's basically settlers and companions but not traders or general pickpocket targets.
Items in their inventory can be equipped by pressing the assigned button/key for "EQUIP" (triangle for controllers, T for keyboard, by default).