Picking the right ammo for your AR 15 can be difficult, as each manufacturer produces a unique round that may interact with your specific weapon differently. From various amounts of powder to larger or smaller bullets, each cartridge serves different purposes and is suited to different situations. To make picking the right .223 Remington or 5.56 NATO round easier, our team at OpticsPlanet has assembled the options that our customers have rated the highest. Below are answers to some frequently asked questions about .223 Remington and 5.56 NATO ammo to further help you make an informed decision![]()
Despite the different names, these two rounds are the same caliber. The main difference comes in how the rounds are made, and the purpose behind them. 5.56x45mm NATO ammo is the standard bullet for military M4 rifles and other NATO weapons, and it is loaded to a higher pressure. On the other hand, .223 Remington is the civilian version of the same round, and it is loaded at a lower pressure for AR 15 rifles and other firearms. You should only use the ammo that your weapon is stamped for, as shooting 5.56 NATO out of a weapon made for .223 can damage it. The exception to this is if your barrel is stamped for .223 Wylde, which is rated for both types.
Here at OpticsPlanet, we strive to provide high-quality products at affordable prices, and our rifle ammo is no exception. From green tip full metal jacket (FMJ) rounds from Winchester to Hornady hollow points, we have plenty of options to suit your needs.