Re reading the list you are ahead of me on a last ditch kit with your necklace.
One thing I don't understand (been a long time since I wore a uniform). Why have a pistol and mags when you've got a carbine anyway? I'd have thought more ammo for the rifle would be a better use of the weight.
And as someone pointed out; you could combine the 2 knives, crimpers, wire cutters and rescue cutters in one multi tool.
Could you fit a heat shield blanket in there? Reading 'Bravo two zero' when they didn't bring sleeping gear it was a fatal mistake for some.
The Sock