structural:reformatting, linguistic:voice_change
Interwar period

During the late 1920s through the early 1930s, gunmen from criminal gangs in the United States began wearing less-expensive vests made from thick layers of cotton padding and cloth. These early vests could absorb the impact of handgun rounds such as.22 Long Rifle,.25 ACP,.32 S&W Long,.32 S&W,.380 ACP,.38 Special and.45 ACP traveling at speeds of up to 300 m/s (980 ft/s). To overcome these vests, law enforcement agents began using the newer and more powerful.38 Super, and later the.357 Magnum cartridge.