Shooters aim firearms at their targets with hand-eye coordination, using either iron sights or optical sights. The accurate range of pistols generally does not exceed , while most rifles are accurate to using iron sights, or to longer ranges whilst using optical sights. (Firearm rounds may be dangerous or lethal well beyond their accurate range; the minimum distance for safety is much greater than the specified range for accuracy). Purpose-built sniper rifles and anti-materiel rifles are accurate to ranges of more than .