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Kramer Defense is a new company started three and a half years ago to design new cartridges and operating system components for the AR15 / M16 weapon system. Our first project was developing a new cartridge that would deliver more power or muzzle energy than the existing .223 Remington or 5.56mm NATO cartridge.
The 6.8 X 45-mm Urban Combat Cartridge (UCC) is the Kramer Defense solution to the inadequate terminal performance delivered by the existing 223 Remington or 5.56 X 45-mm cartridge most commonly chambered in the AR-15 / M16 / M4 weapon platform.
Based on the existing 223 Remington case necked up to accept the 6.8-mm / .277 caliber projectile and utilizing the same 115 grain Open Tip Match (OTM) bullet most commonly used in the 6.8-mm Special Purpose Cartridge (SPC). The 6.8 X 45-mm Urban Combat Cartridge offers the best balance of cost, increased terminal performance, felt recoil, weight, and ease of weapon modification available for the AR15 / M16 / M4 weapon system.