What Caliber Does an AR-15 Shoot? Understanding AR-15 Ammunition
The Foundation: Understanding the Core Calibers At its heart, the AR-15 is most frequently associated with two primary calibers: .223 Remington and 5.56x45mm NATO. These two rounds are often discussed in the same breath, and for good reason. They share very similar dimensions and can often be used interchangeably. However, subtle differences exist, and understanding … Read more
