Not that anyone would notice. Remember, almost every battle rifle made in the last 100 years has included an aperture sight and many of them have had wings. (ie: the M-16 / AR-15)
No worries... Install the sight, shoot it, sight it in, then forget about it. Just look through the hole and ignore the rear sight completely... Focus on front sight alignment with target, breath control and trigger squeeze.
Hope that helps,
ANDY