Some good looking steel there. What optic is on the AR, is it a 1-4x Nikon?
That's a Leupold Varix III 1.5-5. It's a great scope for 100-400yds. I might send it back to Leupold for a mil dot reticle. I picked up a Larue quick release mount that I hope to be able to use to swap out a scope and a red dot.