What Round Does An AR-15 Use? A Complete Guide
The Standard Ammunition: A Closer Look at the Two Primary Choices .223 Remington and 5.56x45mm NATO: The Core of the AR-15 The heart of the AR-15’s operation lies in the ammunition it utilizes. The most commonly associated rounds with the AR-15 are .223 Remington and 5.56x45mm NATO. These two cartridges are closely related, and often … Read more