The AR15 shoots .223 Remington and 5.56 NATO. Plenty of other calibers fit too.
- 55 grain FMJ: cheap practice ammo
- 62 grain (M855): common NATO round
- 75–77 grain: great for precision and defense
- Soft point or polymer tip: for hunting
A 5.56 chamber shoots both. A .223 chamber should stick with .223. See Caliber Conversions.
Watch
Shop AR15 gear
We may earn a commission from these links at no cost to you. Learn more.