Nikon 1.1-4×24 Monarch African Riflescope for AR-15
I think you know the new trend in competition shooting like practical shooting and 3-gun: more and more shooters have scopes on their AR-15 rifles. Distances are pretty big and it becomes critical to have advantage of 1-4x magnification. 4x is enough to be able to hit targets on distances up to 200 meters without any problems.
Wide angle enables shooter to see all what is happening around. 1x mode is needed for use of scope as holographic sight on close distances. You can use magnification fast and easily.
It is more than enough to have 4x magnification and you can hit targets on long distances without any problems.
So what good about scope on AR-15 is that you can easily hit targets on close distances when scope is in 1x mode, and when you need to hit targets on longer distances you can easily choose magnification you need.
This is one simples ways to get advantage over competitors which use AR-15s without scopes.
Thanks to my friend Alexander for info about scope and rifle.