Those are great looking weapons.
I'm curious though, is there a reason you have the red dot site so far forward? If not, you are just limiting your field of view the farther you have it away from your eye. It also slows your site picture/site alignment time.
The army disagrees with you. From FM 3-22.9 (RIFLE MARKSMANSHIP M16A1, M16A2/3, M16A4 and M4 CARBINE), section 2-5 b.:
The M68 mounts directly to the integrated rail on top of the M16A4 and M4-series weapons (in place of the carrying handle). The half-moon spacer (1) should be installed to raise the M68 above the front sight post but the M68 can still be fired without the spacer. The soldier's preference dictates exactly which notch the M68 is mounted to. Although any notch is acceptable, testing has shown that the farther away the M68 is from the soldier's eyes, the better his field of view.