My Father has a SS Sterling 380. I was shooting it last Saturday and at 20’ it hits about 10-15” high. The rear sight is lowered all the way. I would think that the only way to adjust the sights now it to rais the front sight. I don’t think there are any larger replacements available for it. I was thinking of adding some PC7 or similar epoxy product and then shape and adjust it with a file. Any other ideas?