Cor-Bon is a brand of small arms ammunition produced by Dakota Ammo Incorporated. The company, based in Sturgis, South Dakota, was founded in 1982 by Peter Pi.
The company is known among other things for the development of the 400 CorBon cartridge, essentially a .45 ACP case necked-down to a .40 caliber bullet, to which many guns chambered in .45 ACP can easily be converted. Cor-bon also designed and developed the .32 NAA, essentially a .380 ACP case necked-down to a .32 caliber bullet, and the NAA Guardian .32 NAA pocket pistol in partnership with North American Arms. At the 2004 SHOT Show, Cor-Bon and NAA introduced their jointly developed .25 NAA