What is .223 Remington?
[[File:Cartridges .222 Remington, .223 Remington & 5.56x45mm NATO.jpg|thumb|alt=From left: .222 Remington, 223 Remington, and 5.56×45mm NATO |From left: .222 Remington, 223 Remington, and 5.56×45mm NATO]] The '''.223 Remington''' (.223 Rem) is a type of [[Cartridge (firearms)|firearm cartridge]]. It is the most used cartridge for [[AR-15]] type rifles. [[Category:Pistol and rifle cartridges]] [[Category:Military cartridges]] {{military-stub}}