On a side note, I would not buy a sight that does not have the battery that can be changed without removing the sight. That was a big draw back to the Burris FF2. The sight had to be removed to replace the battery and then the gun had to be resighted in.
It was always close but never back perfect like before removing it.
This is why I have run the Burris FF#3 for about 8 years. Replace the battery and never have to rezero or remove the sight....
