Most operators add/subtract from their kits depending on terrain/season/location. Fishing gear in deserts - not so useful.
They probably won't add much first aid stuff, that's another kit that is carried. It too is added with personal stuff.
Knives/compasses are always carried, as are lighters/matches. Most of the time, the compass is dummycorded to you, as is a smaller SAK/multitool.
Considering what I used to carry in my pockets and/or in my web gear, which I pretty much wore 24/7, I didn't carry a seperate kit.
Oh, good OP-SEC there procurement people. Want to guess how many operators are in NAVSPECWAR?