The M16 family of rifles have an effective range of 550 meters for a point target and 800 meters for an area target.
550 Meters at a point target, 800 meters at an area target. By the way, M16A3 is not a military nomenclature - it was coined by Colt when they made an M16A2 with an M16A1 trigger group for export customers.
5.56 mm
25,000 rounds
The effective range of an M16 assault rifle with a 20 inch barrel is 550 meters for a point target, and up to 800 meters for an area target.
25,000 rounds
5.56 or 223 cal.............................
The maximum effective range of the M16A4 assault rifle for hitting a point target is 550 meters (600 yards).
550 metres at a point target, 800 metres at an area target.
1.5 miles. Not the effective range, but total range.
2800m
100m