It was claimed that the M-1951 field jacket could stop a 90 grain 7.62×25mm Tokarev pistol round at the muzzle of the gun.
It was not until 1970 that the U.S. National Institute of Justice, which now publishes test and performance standards for body armor, began a deliberate program to develop body armor for law enforcement personnel that would be effective against specific threats that were common causes of officer injury and death.