A lot of the time you will drop what's in your hands when you triple carry. They have added what I believe is called a magic pocket so if you are triple carrying and climb a ladder or go down a ladder you won't drop what you have in your hands. If you're triple carrying and in a hurry to get in the vehicle just let it drop and open the inventory after you get in the vehicle and place it in storage then. Also if you have an item in your inventory and find more of it in a container take it out of the container and double click. It will auto join what you have in inventory. If you drop an item on the icon for maybe the backpack it will auto rotate if necessary instead of having to manually rotate it.
Next time you can disassemble one of the MP5's with the tool box and repair the other MP5's with the parts. That could have helped a little in the bunker.
