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Ukraine's Liutyi drone had an inauspicious start but is now behind 80% of successful strikes on Russian oil refineries, according to Ukrainska Pravda.
Read MoreExperts have said it's only a matter of time before a drone causes serious damage to a manned aircraft.
Read MoreThe video, shared by the Ukrainian Ministry of Defense, appears to show the ground drone firing its Shablya M2 machine gun at a Russian outpost.
Read MoreThe US aircraft downed the drone because it was considered a threat to US troops in northeastern Syria, The Wall Street Journal reported.
Read MoreThe company said the drone, an upgrade on its Punisher model, is resistant to electronic warfare, which has heavily impacted Ukraine's drone attacks.
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