The early 1900s were perhaps Browning’s most prolific and influential period, with the invention of firearms such as the M1911 handgun, M2 .50 caliber machine gun, and .380 ACP and .45 ACP calibers.

The story of the 9mm vs .45 ACP is kind of a strange one. If you asked even self-described “gun people,” they would likely say that the 9mm is the newer cartridge, and the .45 ACP (or .45 Auto) is an ...