AR-15 rifles can be extremely accurate and obviously, the chambering can come into play. Let's say we have a standard AR-15 with a 16" barrel chambered in 5.56. Most would say that it can shoot accurately out to 500-600 yards. There are a lot of variables but to summarize with the right mix of things like ammo, optics, barrel length, weather conditions, etc. the AR-15 is suitable for most accuracy needs.