Pakistan is a nuclear weapon state outside of the Nuclear Non-proliferation Treaty. It is believed to have about 120-130 nuclear weapons. Pakistan continues production of fissile materials for weapons.
As of the end of 2014, Pakistan had an accumulated stockpile estimated as about 190 kg of plutonium. This plutonium has been produced at two production reactors Khushab-I and Khushab-II. In 2013 and 2015 Pakistan started two additional production reactors, Kushab-III and Kushab-IV. Spent fuel from these reactors may become available for reprocessing in 2015 and 2016 respectively. All four reactors appear to have similar capacity, assumed to be 40-50 MWt each.
As of the end of 2014, Pakistan is estimated to have a stockpile of 3.1 ± 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.