AR is among the most reliable rifle platforms in the market today. It is usable for various applications such as hunting, competitive shooting, and tactical operations. It is pretty versatile, even to the attachments that you can mount to it.
Of course, your AR15 is better off if it has a reflex sight. Target acquisition is an easy task if this particular component is present on your rifle. A close-range rifle like the AR-15 can benefit more from a reflex sight than an iron sight. It gives you the flexibility to roll on the field without compromising your pace. Such versatility is not present on any iron sights unless you are already an expert on using them.