Walt, why do you scribe a pencil line at .170 height and place a piece of small masking tape square across the front sight at .170. line up the .170 mark and test fire and see where you are at.

if still too low, move up to the desired mark for point of aim and order the appropriate height front sight from either SW or Brownells. If Brownells has them in stock, they will have a better turn around.

my suggestion to get you were you need to be.

oh, thats a really tall front sight. night sights are that tall. I cannot see the face of the front blade. I can tell the rear is a factory non night sight.