Kyiv is bolting two Soviet-era missile systems together to knock down Russia's fastest Geran-4 and Geran-5 drones. Ukraine's 156th Maksym Kryvonis Anti-Aircraft Missile Regiment has downed about 20 air targets using a Kub launcher firing under the radar and fire control of a Buk unit.

Russia has switched to jet-powered Gerans, faster drones that Ukraine's cheap interceptors struggle to catch, so more of them reach their targets. The damage from Russian strikes is set to reach up to $10 billion this year, according to Ukraine's Economy Ministry.

Meanwhile, Western resupply has thinned too. Deliveries of air defense missiles from partners fell threefold in the first half of 2026 against 2025, even though those partners hold the missiles, President Volodymyr Zelenskyy says.

So crews stretch what they have. In the Kub-Buk hybrid, a Kub launcher cannot aim on its own, lacking a radar to light up a target for its missile, according to Militarnyi. A Buk has that radar, so the two fire together, the Kub sending its 3M9 missile where the Buk points. The pairing is possible because both come from the same Soviet design line.

Western missiles in Soviet launchers

The same regiment reaches for a second workaround as Buk missiles run short. Its crews have rewired launchers to fire American RIM-7 interceptors, a Soviet-Western mongrel that troops nicknamed Frankenstein and the US calls FrankenSAM.

The patchwork earns its keep. One crew commander said some of these machines have more than 34 air kills each, and a single launcher has sent up RIM-7s 131 times, Ukrainian troops said.

A layered answer

The hybrids are one thread in a wider web. Ukraine is stitching together a layered defense against the jet-powered Gerans, leaning on electronic jamming, fighter jets, and a new class of homegrown interceptor drones. Each tool has limits, and the newest interceptors still bring down only the occasional jet drone.

The bet now is on numbers. Ukraine aims to build up to 400 interceptor drones a month by the end of October to chase the faster Gerans, Zelenskyy said on 2 October. Until that scale arrives, improvised launchers like the 156th Regiment keep filling the gap.

Ukraine has found the US component in a Russian jet-powered drone targeting civilians, supermarkets, medical warehouses, and bridges. According to its Defense Intelligence, the new weapon contains a PNI5GA magneto-inductive sensor made by the US company PNI Sensor.

The US-made navigation component adds to evidence that Western technology continues to appear in Russia's strike drones. HUR had already identified US-made chips in the Geran-4 in May, but the newly reported PNI5GA is a navigation sensor in a modified version of the drone that Institute for the Study of War (ISW) says Russia may seek to field ahead of winter.

A Russian engine replaces the Chinese one

Russia has also replaced the drone's Chinese-made Telefly turbojet engine with a Russian-made equivalent produced in Alabuga. Russia is using the Alabuga zone to bring more of its drone production home rather than importing Iranian or Chinese parts, according to the ISW.

"The remaining electronic units and components are unchanged and identical to those used in previous Geran UAVs," HUR said.

What the warhead is built to cut

The modified drone also carries a specialized KRSN warhead designed to cut through bridge structures and power-line supports. Presidential adviser Serhii Beskrestnov described the warhead on 30 September, saying it consists of a 40-kilogram main charge and four strike modules. Its warhead is meant to destroy hardened targets made of steel and concrete and to damage cable-stayed bridges.

Russia has stepped up strikes on Kyiv's Northern and Southern bridges across the Dnipro in recent days with such drones.

However, Russia may try to field more resilient and more dangerous versions of its strike drones before Ukraine has effective countermeasures in place. Russia could use them to degrade Ukraine's energy infrastructure and logistics ahead of a winter strike campaign that it said will very likely be brutal.