Range has stopped being the binding constraint on very long range air-to-air missiles. The kill chain that enables the range is.
The physics of reach is close to exhausted. Lofted range scales with burnout velocity squared, so every increment of reach costs disproportionate propellant mass. Hence two-stage on Malice and dual-pulse on PL-17: not to go faster, but to hold reserve energy for terminal manoeuvre after the coast phase has bled it away. Ramjet [Meteor, PL-21] sustains better but demands intakes, which is where propulsion collides with signature. Solid impulse is fixed near 250 s, volume is never free, and the curve has flattened.
Against that curve, what Raytheon has done with the AIM-424 is genuinely hard. Roughly 4.11 m by 0.34 m, about 680 kg, a stated reach in excess of 250 nm (450+ km), and it closes inside an F-35C bay door. The two-stage architecture is probably how they bought the range back inside that envelope. The significant thing is not the missile. It is that the shooter no longer has to break cover to carry it.
Set that against PL-17. At close to six metres it will not fit a J-20 bay, so it flies under J-16s. PLAAF did not have a constraint per say, more likely, they delibrately split the problem, J-20 forward as the low-observable sensing and cueing node, J-16 astern as the arsenal. It works. But it puts the magazine on a non-stealthy airframe that has to be shielded, and it makes the engagement contingent on a link between two aircraft with radically different survivability. Malice folds that split back into one platform. That is the real delta.
The price is magazine. Four rounds on a Super Hornet’s pylons against one or two inside a bay. Reach, signature, volume of fire; you get two.
Caveat both figures before anyone builds a doctrine on them. 463 km is a Navy and Raytheon claim on a weapon still in flight test with a classified propulsion section. The PL-17’s 400 km is a Western estimate sitting inside a 300 to 500 km spread. Neither is a measured number.
Now the part that decides engagements. A missile cannot be made stealthy in any load-bearing sense. You cannot shape a body that requires an RF-transparent radome, control surfaces and a plume; coatings and edge treatment buy you something at the margins and nothing against a dedicated missile-warning set. What you can shape is emission timing. PL-17’s passive anti-radiation and IR modes exist precisely to delay or avoid going active. Malice’s guidance remains undisclosed, but you can make a fairly accurate guess as none revolutionary exists in this field or with Raytheon.
Start with the aperture. The radome appears no larger than an AMRAAM’s despite the 13.5 inch body, which points either to a lifted AIM-120 seeker to de-risk the schedule or to a new array of similar diameter. Raytheon has run this exact play before; SM-6, and therefore AIM-174B, carries a seeker derived from the AIM-120C-7. So: active RF, AESA, home-on-jam retained, and almost certainly a passive RF channel added, because at these ranges the target set is defined by what it radiates. Midcourse will be inertial with M-code GPS and a two-way datalink, and the two-way part matters more than the seeker does.
The real inheritance is third-party guidance. NIFC-CA and CEC already establish the principle with SM-6: the launcher need not be the illuminator. Port that construct into the air wing and the F-35C never has to break emission control at all; an E-2D, a forward F-35 or a CCA holds the track and feeds the weapon. That is precisely how you close the cueing gap without surrendering the stealth you just paid for with the internal bay. It is also, I suspect, the actual programme, with the missile as the visible half of it.
The warhead corroborates the rest. Blast-fragmentation rather than hit-to-kill means a proximity fuze and an accepted miss distance, which is what an RF endgame in a 0.34 m radome gives you. What would genuinely be new, and is probably not there yet, is an imaging IR terminal channel or onboard autonomous retargeting. Neither is needed for the mission this weapon was built for.
Everything upstream of that is target location error. At 400 km-plus, time of flight runs to several minutes. A fighter at 450 kt displaces 60 to 80 km in that window, so the terminal basket the seeker must search grows faster than any 0.34 m aperture can cover. That forces continuous midcourse update, which means the shooter stays in the engagement and usually keeps radiating. Range beyond your ability to update is decoration.
Two gaps open out of this. The cueing gap: everything between roughly 150 km of organic fighter radar and the missile’s advertised reach has to be furnished by AEW&C, satellite, passive ESM or a forward CCA. And the credibility gap: the distance between advertised maximum range and the no-escape envelope from which a warned, manoeuvring fighter cannot separate.
May 2025 is the case study, and it cuts the way people rarely notice. Those were PL-15s, not PL-17s, fired inside ordinary BVR geometry. What made Rafales fail so badly was not the seeker or the motor. It was an integrated picture, disciplined emission control, a datalink that held, and the angular confusion the Rafale’s own picture suffered in that geometry, which even I wrote about way before the actual engagement and which has since been briefed at length to Chinese, Pakistani and Southeast Asian audiences. The weapon was unremarkable. The network was not. That is the whole argument in one engagement.
Which returns us to the only question worth asking: how resilient is your mesh. Now impose that on the Pacific, where the distances are continental, the tanker is the fulcrum of every sortie, and the SATCOM and PNT layer is both indispensable and targetable.
So neither PL-17 nor Malice is really a fighter killer. Against a manoeuvring fighter the no-escape zone is a fraction of maximum range (unless it is Indian Air Force, pun intended); against a tanker in a racetrack it is very nearly all of it. That is the design intent. Both weapons exist to make the enabling architecture untenable: tankers, AEW&C, ISR orbits. Push those back 400 km and you shorten every fighter sortie downstream, degrading the opponent by fuel geometry rather than by attrition.
The recursion is the interesting part. Each side’s VLRAAM depends on exactly the node class the other side’s VLRAAM was built to kill. Range-pushing therefore terminates not in propulsion physics but in a contest over who can hold a resilient, distributed, low-signature sensor mesh once the large orbiting nodes become unaffordable to fly.
And where Malice genuinely moves the calculus is carriage. A 463 km weapon inside a low-observable bay collapses the shooter-and-spotter split that PL-17 still requires.