I have a XVR that currently wears a 2-8 scope on a warn rail and rings. I am not crazy about my ability to acquire targets when hunting so its being switched to a FastFire III. With the scope I didnt have any choice of mounting position due to eye relief. With the halo dot I can move it anywhere on the rail. My question is: Where on the rail is the "proper" spot? Or is this simply a matter of personal opinion? My 1911 wheres a Doctor at the very rear of the slide. I cant really compare the 2 guns other than neither of them have a stock. The XVR is much, much more gun and its used more in the 75-150 yd range versus the 1911 in compensated 9mm that is used at 10-20yds.