 The .32 NAA is one of the most recent of a line of commercial bottleneck handgun cartridges.Renewed western interest in bottleneck handgun cartridges began with the .357 SIG in 1994 (necking a .40 S&W case down to a .355 bullet); followed by the .400 Corbon in 1996 (necking a .45 ACP case down to hold a .40 cal.bullet); and then the .25 NAA in 1999 (necking a .32 ACP case down to hold a .25 caliber bullet).