Trying to decide what to put on my AR. I'm still confused.
Since I've never shot an AR very much and not sure how much I will be shooting, I need help in deciding on what kind of scope to purchase. Will probably just target practice or shoot coyotes.

1) Standard rifle scope (like Nikon Buckmaster)
2) Red/Green Dot
3) M-223 AR Riflescope

Does one have an advanage over the other?
Would the red/green dot work for coyotes?
Does the red/green dot have a max range?
Is red/green dot mainly for close range?
Is there and advanage with a M-223 scope?

Any info you experienced AR shooter's could give me would help.