I have the ATRCR, I also have the k16i, I also have the razor 1-6, my razor 1-10 is coming soon. I compete heavily in 3 gun. Each has strengths and weaknesses, K16i I use in matches where max range is 300ish and I need to be fast and light for close and medium targets. The big eyebox and huge fov are fast off hand in and out of compromised positions. Trying to shoot through the bottom notch in a vtac wall on your belly is surprisingly pleasant with the kahles at moderate magnification. The ATACR is a beautiful robust scope clarity is amazing nicest one to look through, my big problem is running and gunning is not ideal since the eye box and fov can be picky. Off a bench or prone great, pretzeled up behind some pile of wood breathing hard is anoying. It is clear enough to shoot extremely well but at this price the eyebox bugs me. Razors have good eyeboxes and good fov, if the razor 3 has a good middle ground between these two it will probably be fastest overall 3gun scope for me. I need more forgiving than NF but bit more mag and ffp vs kahles. We shal see soon.