My Troy's front post has to be bottomed out to get on target at 100 yards. I think it may be something to do with the height over the bore, but not really sure. Bottom line, they are a backup, not even close to precise even by iron sight standards, so as long as they can help me hit a target at 100 yards if necessary, and fold out of the way when not in use, they work for me. If I had to crank the rear one way to the left or right, that would worry me more.