A typical Ukrainian FPV fragmentation warhead made from two concentric pipes, with the inner filled with explosive with an electric detonator, and the outer with chopped steel rod.
The ends have laser cut fragmentation discs.
The electronic fuze was mounted on the drone.
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Another example from a different improvised Ukrainian drone munition of the laser cut fragmentation discs.
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This similar munition was just posted.
These electric detonators may be from commercial sources like the mining and demolition industries.