Wow!! I wonder what someone was planning.
Found buried. For how long? Nice little stack of C4 there.
Said 20 years but I’m not sure how they determined that. Any of that stuff have serial numbers or issue dates?
C-4 had lot number on the wrapper, and IIRC, a date of manufacture. I don't recall any similar markings on a Claymore, but that doesn't mean there weren't any.
Plot twist, ATF buried it for the Cartels.