The first known use of the system was on the Fritz Mann pistol in 1920 and later on the High Standard Corp. model T3 experimental pistol developed by Ott-Helmuth von Lossnitzer while working for High Standard.
The first known use of the system was on the High Standard Corp. model T3 experimental pistol. The chamber-rings were developed by Ott-Helmuth von Lossnitzer while working for High Standard.