I have been doing a lot of searching for the best "bang for you buck" AR-15 Rifle scope and I came across the Nikon ProStaff BDC (Which 99% of the reviews loved it) and was pretty close to pushing the buy button when I decided to do a little more research (And I am glad I did). I started looking at the Nikon P-223 since it was specifically made for the AR-15 platform. I started looking at prices as well.
Nikon ProStaff 3-9X40
176.99 (Best deal I could find in stock w/ Free Shipping)
Mount(s) Minimum of $45
Total of $222 at minimum
The Dicks Deal below is dead but as X2CT Stated Cabela's is also selling it with free mounts (Not the Nikon M-223 XR AR but still free!)
Nikon P-223 3-9X40 $199.99
Nikon M-223 XR AR (Mount made specifically for the scope)
Total of $300 (not including tax)
BUT I was able to get the Nikon P-223 and the Nikon M-223 XR AR for roughly $214 Shipped!