Slang term for modern United States military
combat helmets. The "k" in "k pot" refers to either "kevlar" (the material it's made of) or "kraut" (for its resemblance to the World War II German
Another term for the helmets is "Fritz" helmet, again referring to its resemblance to WWII-era German helmets.
Guy shoulda worn his k pot, now he's got an extra hole in the head.