Long term underground ammo and gun storage

“Sir Jeff” at Survival HQ writes

Close to 4 years ago I placed this cache. The gun was lightly oiled and placed with a desiccant pack in a mylar pouch. The magazines were also given the same treatment in their own mylar. Ammo was packed in ziplocks with desiccant also. Then a few extra desiccants thrown on top, the seal of the ammo can greased, and it was shut. The can was wrapped in a heavy garbage bag.

There were no failures whatsoever. No rust spots or discoloration. Even all the brass looked new.

Mylar seems a good idea.

[ Many thanks to Todd for emailing me the link. ]

Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


  • Peter

    Ziploc bags are polyethylene, not Mylar.

    • Peter, he author used both.

  • Anecdotal

    Is there also a sandwich in there?!?

  • Dakota

    Packed ammunition and a sandwich for the apocalypse.

  • Hudson

    If you are planning on doing this on a larger or more critical scale, I would suggest you equip yourself with a bottle of dry nitrogen, regulator, and hose available at your local welding supply.

    Displacing/flushing all of the air with nitrogen will greatly extend the storage life of your supplies, this does require good airtight containers, but if you are going to this much effort why take a chance.

    This is also a good idea for food storage.

    Also a heatsealer is much better than a “ziploc” bag.

    Watch out for PVC as it is chemically active.


  • Jim

    I certainly wouldn’t expect there to be. Who believed that rust can get through 2/3 seals and desiccant bags?

  • GaGator

    Anticipating… BATFE confiscation efforts?

    Interesting quasi-political post for this blog,
    and I thank you for it.


  • Greetings from Texas,
    Interesting, and good to know.

  • That looks like a sandwich to me too 🙂 How did that last?

  • dave

    Underground is a bit of a misnomer, IMO. Still pretty impressive.

  • Martin (M)

    I, too, thought I saw a sandwich!

    Underground storage is perfect, because zombies don’t think to look there.

    Personally, I’d use a food-grade vacuum sealer for the ammo. They’re cheap, and would eliminate corrosion by removing the air (oxygen). I believe you could even get bags long enough for long guns.

    Another simple technique is packing everything in nitrogen. You can buy nitrogen from any welding or gas supplier. Since it’s slightly heavier than air, all you have to do is gently pour it into the container and it will displace the oxygen. I used to do it all the time with sealed electronic drawers.

  • Komrad

    interesting that the ammo appears to be loose packed, though I suppose most a cardboard bow would attract any moisture left in the bags

  • Kyle Huff

    Mylar is polyester. Ziploc bags, as mentioned by another commenter, are polyethylene.

  • Kyle Huff

    Mmm… Mylar bags for emergency storage.

  • Alan

    What good is the gun buried underground really doing you?

  • Matt

    When you think it’s time to bury your guns it’s probably time to dig them up.

  • Mr Maigo

    Protip: Ziplog bags, they aint airtight.

    If you want to store guns long term, you can’t beat digging a hole, filling it with AK47’s then covering it up

  • Justin Grigg

    Some guns are just meant to be buried.

  • Jim

    an alternative to using nitrogen is to use O2 absorbers.. figure the size of the bag, then place the amount of absorbers in the bag.. done.. you can do the same for the rest of the cache.. so long as the containers are sealed..

    i could see if you were burying a pirate’s booty.. a pistol, a couple hundred rounds and a stale sandwich is not going to get you through a zombocalypse..

    it would be better to do this on a much larger scale.. i.e. a 20-40′ storage container with top-side access.. essentially, a zombie shelter..

  • Steve

    Hmmmm…..zombie shelter……

    Oh, you mean to hide FROM the zombies, not to live there with a bunch of them… I get it now.

  • Eli

    Um…were is the can of spam?

  • It looks like his website is now gone.

  • While there are a lot of critiques on this method, in the end it’s good to know that it can work with a real stress test. There are a number of reasons you may want to keep some firearms or other valuables stashed underground for a time.

  • Sam Suggs

    well prepared caches will be one of the few things left of our civilisation for future archologists

  • KeepingSenseInLawEnforcement

    So I would like an unimproved piece of hard to find real estate–not where I live to make it easier to hold onto from lender foreclosure, assessors (cheaper and held by a personal corp). Not so big as to hold a sea going container unless it was bunker time. I thought some container that I could bury after getting well acquainted with a post hole digger. Some way to defeat hand held metal detectors. Hidden from view. Not hard to get to. Keep some “junk” firearms to deflect attention at your abode.
    Different states have everything the Assessor values online. Insurance companies use it or you can look up your neighbors value. I did that and protested a valuation. They reduced mine too. JoeBlow generally can’t look up property by name but by address or schedule number–govt can look up by name so get a parcel in another county using a corp name or LLC.
    Keeping things underground, secure, and dry……but not impossible to get to is the goal.