.223 (disambiguation)

.223 may refer to:


 * .223 Remington cartridge
 * .223 MINISAS, a cartridge for close-quarter battle use
 * .223 Winchester Super Short Magnum, a cartridge based on the Winchester Short Magnum case
 * .223 Wylde chamber, a hybrid rifle chamber designed to allow .22 caliber barrels to safely fire either .223 Remington or 5.56×45mm NATO ammunition