Putting together a Survival Fitted Case Kit

I’ve known about these commercial survival “kits” for several years now, actually since the first ones came out with the prepper movement gaining attention around 2012.
Its usually a Pelican type case or PVC tube. It includes a gun of course and some other survival related gear like a compass, whistle, emergency blanket or flashlight or even some MRE (meal ready to eat)
Now I know that far more convenient is to have an actual backpack that is lighter and easier to carry, and put your gear in there. This makes for more practical bug out bags, EDC bags, or get home bags to keep in the vehicle. Something that can actually be carried somewhat comfortably.
Still I like the idea of a kit with fitted gear in a tough impact resistant or even waterproof case.
I think they look pretty neat. They also remind me a lot of those old fitted gun cases, with tools, a bottle of cleaning oil and other trinkets.  I see these as more modern rendition of those great classic cases to some extent.
So, one day looking online I came across a nice deal on a surplus Explorer case. I made and offer and lucky me I ended up winning it. Now this is what I have to work with:


I’m thinking adding a few mags, maybe a cleaning kit and a knife or multitool. I’ll update you once I put it together.
Or maybe a shotgun kit:

At this point I’m just looking for ideas. In fact if you have any pics, comments, links of pics you just happen to like or suggestions of possible content to include in the kit leave it in the comments below or send me an email.
What handgun or long arm would you chose for a kit like this? What gear would you put in it?
Its a fun little project which you may try out yourselves.
Here are a few commercial models to get you brainstorming:
Stag Arms Executive Survival kit

Smith & Wesson

Steyr AUG survival kit

Taurus First 24 Survival Kit
Mossberg JIC (just in case) Shotgun Kit
The Mossberg version is probably the cheapest. Just a PVC tube, end caps and glue.
FerFAL
Fernando “FerFAL” Aguirre is the author of “The Modern Survival Manual: Surviving the Economic Collapse” and “Bugging Out and Relocating: When Staying is not an Option”