I just made an all leather case last week. If any **** HTF scenario breaks loose, I have a kit ready to pick up and get mobile.
My kit contains a G26 w/3 10 round mags, one 10 +1 Mag and 3 thirty- three rnd mags along with a fire steal, tinder , flashlight, cotton balls, 25 feet of paracord and two boxes of live rounds, a double mag holder, snap on holster, leatherman, knife, pencil and paper.
The fire starter kit is in a smaller latched pouch the incorporates a belt attachment spring if necessary.
I'm not paranoid, it was just a fun project which (doubtfully) possibly could pay off one day. It has no previsions for MRI's and the sort.
I just learned a couple months ago that cotton would burn. The fire steel lights the cotton balls right up. I also dabbed them in vaseline which increases burn time for tinder.
I probably need to make a shoulder strap for other clip-on kits.
Also learned to make some interesting knots.
That said, its all been lots of fun being a kid, in this 56 yr old tinkerers body. Its all been well worth the effort & time spent.
Next I think I will make up a small necessary kit for my Marlin 1894 (357 mag). That would be light in the weight department plus the ammo won't require a lot of space.
The 9mm kit kinda looks like this: