Up/down are not adjustable. I'm looking at replacing mine because the glow material on the original sights are so dim as to be useless. in fact i just started a thread about them. I'm hoping that an new matched set will be a universal thing. out of curiosity, are you shooting low? have you shot from a rest to reduce the variables of flinching pushing, etc.? are you placing the front dot on the bullseye and it's low? I read an article somewhere that discussed sights and sight pictures. some were being made so you put the top of the front sight at the middle of the bullseye, others were contending the dot over the bull.. I'll try to find the article and post it