Rifle cartridge reference
5.56 NATO Ammunition
Also known as 5.56x45mm, M855, XM193.
The military-spec sibling of .223 Remington, loaded to higher pressure. The default rifle round for the AR-15 platform.
At a glance
Common firearms in 5.56 NATO
Frequently asked
How much does 5.56 NATO cost per round?+
5.56 NATO typically runs about $0.35–$0.58 per round online, roughly $465 for a 1,000-round case at the middle of that range (as of 2026). Bulk cases lower the per-round cost, while premium defensive or match loads run higher. Prices move with supply, so track your own cost per round over time.
What is 5.56 NATO used for?+
5.56 NATO is most commonly used for defense, target, duty. The military-spec sibling of .223 Remington, loaded to higher pressure. The default rifle round for the AR-15 platform.
What firearms are chambered in 5.56 NATO?+
Popular options include AR-15, SIG MCX, FN SCAR 16. It falls in the rifle category.
How much does 5.56 NATO recoil, and is it available?+
5.56 NATO has light recoil for its class, and availability is currently "very common." You'll find it at most retailers and online.
Track your 5.56 NATO the smart way
Rangium logs your 5.56 NATO by the round: stock on hand, cost per round and spend over time, with low-stock warnings when you run short. Ask Vanta how much you have left, and list or find 5.56 NATO firearms in the marketplace.