• KingKong33@lemmy.ml
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    7 hours ago

    Where do you live that 21cm reinforced massive concrete is the primary building material for residential buildings? That’s not common. Regardless, I said most materials. Not all.

      • KingKong33@lemmy.ml
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        7 hours ago

        If any caliber would be capable of going through that, it would be .50 BMG, but you may have found the exception to the rule.