Pakistan is a nuclear weapon state outside of the Nuclear Non-proliferation Treaty. It is believed to have about 140-150 nuclear weapons. Pakistan continues production of fissile materials for weapons.
As of the beginning of 2020, Pakistan had an accumulated stockpile estimated as about 410 kg of plutonium. This plutonium has been produced at four production reactors in Khushab.
As of the beginning of 2020, Pakistan is estimated to have a stockpile of 3.9±0.4 tons of HEU and continues to produce HEU for its nuclear weapon program. Uncertainty about Pakistan's uranium resources, and the operating history and enrichment capacity of its centrifuge plant at Kahuta and a possible second plant at Gadwal (which may be dedicated to HEU production) limits the reliability of the estimate.