Why does it have to be ductile cast iron? Scrap auto bodies melted into rod or actual bullets. Shouldn't care about the exact physicals.
Didn't the AR15 tumble back during 'Nam? Iirc, your friend with the BAR was handy to have for tree snipers.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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