Optex Systems Holdings Inc. (OPXS)

[Killatree]

Europe could be in a war at any moment with Russia's sudden aggression. If our NATO allies decide to build up their defenses, they're going to want tanks, and they'll be buying them from us.

Even without that:

"While the U.S. periscope market has experienced an overall declined since 2009, Optex has mitigated a significant portion of the reduced U.S. military orders through increased market share in both foreign and domestic defense contractor markets."