Jerm_G wrote:
Using the results of a TV show for facts is generally not a good idea. But good job on citing your source for your information.
Now for the real answer...
Yes trained shooters conducting CQB engagements with the M-4 family of weapons will tend to shoot high on their targets. This is because the sights sit aprox 2.5 inches above the center line of bore, causing the round to impact 2.5 inches below point of aim. All though trained to compensate for this, the training tends to go out the window when under stress due to loss of fine motor control. The shooter does one of 2 things. He compensates too high and throws the shot, or suffers from over sway when coming up from the ready, and throws his shot. Those not trained in CQB shooting tend to do the opposite and shoot low because they do not compensate for the sight's height over bore.
Realistically though unless making a precision shot for the brain pan, center mass is more than good enough. The area targeted is about 8 inches wide and 8 inches tall for the average male when centered on the nipple line of the chest. A couple of inches off dead center is not much of a big deal. So the issue is moot.
Good example of this: About a year ago I was doing a range day thanks to Bend PD for their Citizens Academy, and I got to run a M4 and a Sig P226, one magazine each, standing at 7 yards. On the Sig, all of my rounds were center mass, in a group about 4 inches across. For the M4, I aimed for the same general area as the Sig. Again, all of my rounds were in a 4 inch group, but all of them were a few inches below the center of the Sig group. This was consistent, indeed so consistent that the officer handling me knew exactly what I had done without asking, and coached me on how to fix that "if it comes up in the future". I've got the target around here somewhere, its pretty clear.
I think Bushnell came up with a clever little holosight that had a reticle for this particular problem, but its a pretty gucci solution to a simple problem, and still requires something more than muscle memory to use it correctly.