By armor, are we also counting larger, more mechanical things like AFVs, IFVs, Tanks, and APCs?
Or...just talking about worn armor?

Because if we're gonna allow the former, I can give ya some info. 
I can cover most, if not, all armored vechicles in WW2, and a small handful from before (Great War and interwar). I can also help with some vehicles from the Cold War to the present day.

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[quote=@Lady Selune]
If you need answers on early-to-mid 20th century weapons, such as those used in WWI and WWII, I'm ya gal.
[/quote]

The M3 Grease Gun.
I'm still baffled by it's existence.