Which of these military product launches featured a live demonstration where the inventor stood behind his product while being shot at, dramatically proving its effectiveness to potential buyers?

Throughout military history, certain product launches have revolutionized warfare and changed the course of conflicts. These innovations often represented quantum leaps in technology that rendered previous tactics obsolete. This poll tests your knowledge about one such transformative military product launch that had profound strategic implications. Consider how this particular innovation altered battlefield dynamics and strategy.

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Samuel Colt's revolver (1836)
Richard Gatling's machine gun (1862)
Hiram Maxim's fully automatic machine gun (1884)
Casimir Zeglen's silk bulletproof vest (1897)