Here is mine
CMMG 22lr BCG in Bushmaster Dissipator Upper on CMMG MOD4SA lower
My back up iron is a Wilson Combat and I zeroed it at Reed's and its very accurate, had to mount the Pentax 4-16x50mm a little higher because I was getting some fierce reflections from the front sight...
My purpose when building this one was to stay cheap but accurate with both Irons and a nice Scope.
Having the Dissipator's Rifle radius sighting makes aiming just a little better than the other shorter radii.