How does Russia's ammunition production capacity compare to NATO's, and what are the implications for European defense?

According to NATO's Secretary General, Russia currently produces more ammunition in just three months than all NATO countries combined can produce in over a year, revealing a significant military production disparity. This alarming gap has highlighted the need for Europe to take greater responsibility for its own defense amid shifting geopolitical dynamics. Analysts acknowledge that reducing American military presence in Europe, as proposed by Trump, is valid but comes with risks and implementation challenges. There appears to be growing consensus that European nations must enhance their defense capabilities and reduce dependence on American military protection—a transition many Americans believe is long overdue.