What rifles can shoot 223 rounds?

There are a very large number, and a complete list would not be feasible. But some examples can be given. While the .223 Remington is dimensionally similar to the military 5.56x45 cartridge, the two are not the same. A 5.56 rifle may chamber a .223 cartridge - it is not recommended to try firing 5.56 ammo in a rifle with a dedicated .223 chamber.

The AR-15 and variants and clones, Ruger Mini 14, and Kel Tec SU16 are some more common examples of rifles which can chamber the .223 Remington cartridge. The ones listed have a 5.56x45 chamber, although Target models of the Ruger Mini 14 have a dedicated .223 Remington chamber.

Variants of rifles such as the Winchester Model 70, Remington 700, and Ruger No. 1 have been made with dedicated .223 chambers.