Love peep sights, 444 marlin, 54 lyman, 45 colt, 357 mag, m1 grand,45-70, 8mm mauser, Can ya tell I love peeps. work well for shooters with bifocals, peep is blury & front sight is clear, peep centers the front sight, I have firesight fronts on a # of rifles & with low light they work great