So I did the relevant homework to my knee jerk reaction, and here's what I found:
US's FSM/EUM conditions of use upon PAF's F-16 Fleet can be conceptually broken down into 4 Tiers (based on weapons system available to Pakistan):
- A2A Weapons (authorized)
- Tactical A2S Weapons (authorized)
- Conventional Stand-Off / Deep Strike / Maritime Strike Weapons (restricted)
- Nuclear Weapons (restricted)
Source - 2006 congressional hearing on F-16 sale to Pakistan. The concerns raised by Congress were related to
leakage of US tech to China, China/Pakistan tinkering the F-16 fleet for nuclear delivery and potential subsequent use of it.
The DoD representative was clear on how those concerns were already mitigated in the terms and conditions specified in LOA.
Even if nuclear delivery was/is the concern -
it doesn't apply to Harpoon missile, here's why:
After studying AGM-84 Harpoon in more depth, this is what I found out:
- Harpoon was never designed as a nuclear delivery system.
- Its warhead geometry, center-of-gravity constraints, fuzing logic, and structural and thermal limits make nuclear integration impractical per Physics.
- Integrating a nuclear warhead would require essentially redesigning the Harpoon, effectively creating a new missile.
- For Pakistan, any such modification, even in theory, is already restricted by US FMS/ITAR/EUM contacts.
Trivia: US EAR imposed a similar restriction for Conventional and Nuclear weapons export to India until 2005's 123 Agreement b/w the 2 countries - India began a major defense relation with the US, separated it's civil and military nuclear programs, and ever since has been receiving EAR concessions. Here's a recent
example
However, the EAR concessions to India is related to civil nuclear programs and not military.
So the restriction on Air Force variant of Harpoon for both Pakistan and India isn't based on the nuclear strike presumption but regulating the operational use case tied to delivery platform so as to maintain the power balance b/w Pakistan and India. Both Pakistan and India employ Harpoon on their naval assets, and if US is to provide airforce variant of Harpoon then it'd be for both countries but India doesn't operate a US aircraft.
Addressing your second assertion, by comparison, other exporters handle restrictions differently than US:
- France, similar to US, restricts the export of nuclear delivery systems per national and international laws e.g. French Defence Code, EU Common Position 2008/944/CFSP, MTCR, NPT, NSG, and etc. - and polices any attempt to adapt/integrate domestic nuclear missiles with their aircraft (inferred from the laws mentioned and evident from refusal to share source code for Rafales with India) - However, subject to same laws, prior licensing and approval, France does allows the export of conventional stand-off/deep/maritime strike weapons. And, any conventional weapons system once licensed and sold aren't operationally policed as evident from the use case of SCALP-EG from Dassault aircraft by India.
- Russia and China, similar to France, allow the export of conventional stand-off/deep/maritime strike weapons under license and approval, and do not operationally police these systems once sold. Similarly both Russia and China restrict the export of nuclear delivery system, however, there are nuances involved and their restrictions aren't explicit as in the case of the West.
- Russia adheres to Wassenaar Arrangement and Federal Law No. 183-FZ (Military-Technical Cooperation), and doesn't sell any nuclear delivery system itself but also doesn't restrict cooperation as evident from use case of BrahMos (dual capable) with Sukhoi aircraft. BrahMos is an India-Russia joint development, both countries acknowledge its dual capability, yet Russia helped India on BrahMos's integration on Sukhoi by sharing the architectural source code of the aircraft. So in practice, Russia is showing "no concern" if not implicitly permitting the use of its aircraft for nuclear strike.
- Similar to Russia, China has recently reinforced it's export laws concerning the dual-use materials (source) However, JF-17 is a joint development of Pakistan/China and being adapted (if not already) for nuclear delivery system (for Pakistan). Moreover, though the authorized level of integration on J-10CE is not publicly disclosed, it's not operationally policed by China (at least on offensive roles and A2A strikes as evident from use case in May 2025).
So contrary to your earlier assertion Russia and China are already showing least concern and implicitly permitting their systems to be used for nuclear delivery in practice (albeit project specific) in contrast to the West.
And yes, the US places Pakistan’s F-16s in a strict operational straightjacket (as described by
@Ali_Baba),
this restriction is more directed at operational control, maintaining the regional power balance, and keeping the escalation ladder b/w Pakistan and India in check for US supplied systems - rather than a direct restriction only concerning nuclear strike capability of either. Hence, all the more reason to transition from US systems to alternatives such as Chinese platforms, especially as India benefits from French and Russian support for advanced tech and delivery systems.
Note: not an argument against the capability of F-16 but rather highlighting the restrictions it comes with.
@Ibbi32
