The .32 NAA is a little-known personal-defense cartridge. The cartridge is a .380 ACP case necked down to accept a .32- (.312) caliber bullet. The idea was to drive a light bullet fast for massive tissue destruction. The cartridge fulfills its goal but penetration is limited to around 7 inches. Currently, the only firearm available in .32 NAA is the Guardian from North American Arms. Cor-Bon is the only ammunition company offering a JHP bullet for this cartridge. It also offers a lighter-loaded, 60-grain FMJ bullet. Glaser offers a 55-grain Safety Slug for the .32 NAA rated at 1,255 fps.