Community

Using the tall mount that comes with the Romeo5 will give an absolute co-witness where the front sight post should line up directly with the dot. Like this: https://s3.amazonaws.com/mgm-content/sites/armslist/uploads/posts/2018/04/22/8263928_02_sig_sauer_romeo5_1x20mm_red_do_640.jpg

on mine I needed a 3/4 inch riser to co-witness the red dot without a riser the sight will be in the way