"To determine which sidearms were used by the U.S. Army since the 18th century, 24/7 Wall St. used data from the Army report Survey of U.S. Army: Uniforms, Weapons, and Accoutrements. For earlier weapons, we listed the era in which they were primarily used, but for more modern handguns, the exact years of use are noted. This list includes flintlock pistols from the earliest days of American independence to modern-day semi-automatics. (These are the 15 American military guns of the future.)"
"Looking at the evolution of pistols from the 18th century to today provides a fascinating story of technological innovation and military needs. The shift from the hefty 0.70 caliber pistols of the late 18th century to the currently popular 9mm pistols reflects changes in how we view weaponry and strategy. By looking at this millennia-long advancement, 24/7 Wall St. hopes to provide you with a stronger understanding of pistol use in military settings, and why this shift has led to more efficient and reliable weaponry."
Data from the Army report Survey of U.S. Army: Uniforms, Weapons, and Accoutrements identifies U.S. Army sidearms used since the 18th century. Earlier weapons are listed by primary era of use, while more modern handguns have exact years of service noted. The catalog spans flintlock pistols from early American independence through modern semi-automatic pistols. Caliber shifts from late-18th-century .70 pistols to contemporary 9mm reflect changes in technology and military strategy. The compilation includes production dates, chamberings, and primary eras for models such as the British Light Dragoon Saddle Pistol, North Model 1819, and Colt revolvers. The list was updated December 10, 2025 to clarify production dates and calibers.
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