I gathered all the necessary parts to build the completed version the plate carrier vest. However I found if you have an item stored in said vest and you wish to swap it for something equipt it will delete the item going in the vest.

Items on the ground will not be deleted, but rather stay on the ground.

Example: I tend to carry 2 tops/jackets. 1 for camo/protection and the other to stay dry (rain jacket). I had just logged in and noticed it was raining. I had my rain coat (2 slots horizontal) in my plate carrier complete set and dragged my emptied tan tactical shirt (1 slot) over it (getting the light blue option to swap). This resulted in me wearing the rain jacket and my tac shirt being deleted.

Now I chalked it up to bad luck and snagged a brown hoodie not long after. Once the rain stopped however I made the same mistake putting away my rain coat forever more.