Glock rushed the G20 to market in an attempt to capture the FBI contract, which they did - briefly. What followed was a deep 360-degree analysis of nearly every aspect of the event, including a number of recreated videos, which all lead to adapting the much more powerful 10mm Auto handgun round for more penetration and stopping power - at least briefly.
The net of that very bloody 140-plus-round bullet exchange over four minutes between the robbers and 10 carloads of FBI agents was that the FBI felt woefully undergunned with the then-standard.
The initial Glock G20 and the evolved and supersized G40 really came to be due to a 1986 Miami FBI felony car stop of two armed bank robbers.
