which scope to use on 6.8x43 AR, mark AR or m223

[darthceadus]

I'm having trouble deciding on a scope. I was wondering if you guys had any experience with any of these scoped? I'm leaning towards the leupold for the name. Both of this can be calibrated for my round. I will be shooting around 300 yards on a daily basis as I have a concrete shooting bench behind my house. But I would like to touch 500, 600 yards. Thanks!!!!!