Promsintez

Promsintez is one of Russia's largest military explosives manufacturers, based in Chapayevsk, Samara Oblast, and producing an estimated 30,000 tonnes per year of explosives used to fill artillery shells and missiles. On 28 March 2026, Ukrainian FP-5 Flamingo Cruise Missiles struck the facility, igniting fires across multiple sections. The strike was simultaneous with an FP-1 drone attack on the YANOS refinery in Yaroslavl, signalling a coordinated campaign against Russia's military-industrial rear.

The factory is located roughly 1,000 km from the active front line, making its targeting a significant demonstration of Ukraine's extended deep-strike capability. Artillery shell production capacity is a fundamental constraint on both sides' operational sustainability; disrupting explosives fill production upstream of the shell-manufacturing process could propagate effects through Russia's ammunition supply chain over weeks or months.

Samara Oblast's chemical and defence industry complex — of which Promsintez is a centrepiece — dates from Soviet-era strategic dispersal policies that placed critical military industry east of the Urals, beyond assumed Western air attack range. Ukraine's FP-5 programme has rendered that geographic assumption obsolete.