Of a purity suitable for the manufacture of weapons(adjective)
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Use "weapons-grade" in a sentence
"Bulk lasers are much closer to weaponization: the Navy's tested them at "hundreds of kilowatts" - weapons-grade, in other words."
"We had laid down a red line that if they started reprocessing nuclear fuel for weapons-grade material, it would not be tolerated, for it would mean they were a rogue nation with the threat of nuclear weapons."
"If we are serious about stopping the spread of these weapons, then we should put an end to the dedicated production of weapons-grade materials that create them."