Cor-Bon is a brand of small arms ammunition

Ammunition

Ammunition is a generic term derived from the French language la munition which embraced all material used for war , but which in time came to refer specifically to gunpowder and artillery. The collective term for all types of ammunition is munitions...

 produced by Dakota Ammo Incorporated. The company, based in Sturgis, South Dakota

Sturgis, South Dakota

Sturgis is a city in Meade County, South Dakota, United States. The population was 6,627 as of the 2010 census. It is the county seat of Meade County. Sturgis is famous for being the location of one of the largest annual motorcycle events in the world, which is held annually on the first full week...

, was founded in 1982 by Peter Pi.

The company is known among other things for the development of the 400 CorBon

.400 Corbon

The .400 Corbon is an automatic pistol cartridge developed by Cor-Bon in 1997. It was created to mimic the ballistics of the powerful 10 mm Auto cartridge by means of a .45 ACP case, necked down to .40 caliber with a 25 degree shoulder....

 cartridge, essentially a .45 ACP

.45 ACP

The .45 ACP , also known as the .45 Auto by C.I.P., is a cartridge designed by John Browning in 1904, for use in his prototype Colt semi-automatic .45 pistol and eventually the M1911 pistol adopted by the United States Army in 1911.-Design and history:The U.S...

 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

.32 NAA

The .32NAA is a cartridge/firearm 'system' designed and developed by the partnership of North American Arms and Cor-bon Ammunition. The cartridge is based on a .380 ACP case, which is necked-down to hold a 32 caliber bullet with the goal being an improvement in ballistic performance over either the...

, essentially a .380 ACP

.380 ACP

The .380 ACP pistol cartridge is a rimless, straight-walled pistol cartridge developed by firearms designer John Browning. The cartridge headspaces on the mouth of the case. It was introduced in 1908 by Colt, and has been a popular self-defense cartridge ever since...

 case necked-down to a .32 caliber bullet, and the NAA Guardian .32 NAA pocket pistol in partnership with North American Arms

North American Arms

North American Arms is a United States company, headquartered in Provo, Utah, that manufactures small pistols and mini-revolvers.The company was originally named Rocky Mountain Arms...

. At the 2004 SHOT Show

SHOT Show

The ' is an annual tradeshow for the shooting, hunting, and firearms industry. It is the biggest event of this type in the world together with IWA & OutdoorClassics , also taking place annually. "SHOT", besides being a general reference to shooting, is an acronym for "Shooting, Hunting and Outdoor...

, Cor-Bon and NAA introduced their jointly developed .25 NAA

.25 NAA

The .25 NAA was introduced by North American Arms company for their smaller & and lighter .32 ACP Guardian model. It is simply the .32 ACP necked down to accept .251" diameter bullets....