@MistWolf:
I still have to disagree. I think personal preference also plays a huge part when it comes to optics placement.
I played around at work today, with my Micro T-1 (for my MP7), mounted all the way forward on my HK416 rail forearm. It's on an Aimpoint lever release mount and low spacer, so it sits quite low.
Can't really say it increased the difficulty at all. Same experience with my Docter sight equipped M&P; it wasn't difficult, just unfamiliar. With a few reps, I now have no issue presenting the gun and acquiring a good sight Picture immediatly. That said, comparing an optic equipped handgun to an optic equipped rifle is like comparing apples to oranges. You have much more positive control over your rifle, ie more contact points, resulting in less movement. It doesn't take much movement of the pistol to also move the optic, and the dot, in relation to your eye.
Trying to sort out the download issue.
ETA:
This link should work:
http://rapidshare.com/files/23144366...ngavoptikk.pdf