Interesting about O'Connor's remarks re the flat-top. The Leupold I had used a rounded post.
The sharp tip of the Leica I had would round off in low light. I can see where you could possibly shoot high if you didn't use the crossbars for an index in dim light or if it is just bad form--shooting over the top like you do with a shotgun, failing to get your head down
OTOH, with an illuminated triangle, that should not be the case. A lot of guys use the Trijicons on their ARs with the post and illuminated triangle, shooting as fast as possible and I don't believe there are any issues. The more I use that set-up the more I like it.
