I've used reflex sights on rifles, and didn't care for the way they stood proud and suseptible to taking bumps/damage.
Plus - JMO - although about the same height as a scope, because they have virtually no length, comparatively-speaking, they looked fragile & out-of-place.
Have you tried the illuminated fiber-optic sights, like Williams FireSights, Hi-Viz, T/C, or TruGlo's ?
I've put them on every rifle I won that has iron sights, and think they work wonderfully.
FO front sights are available in different sizes, just like 'normal" gold or ivory beads - a 1/16"/fine bead size, and a 3/32'/coarse size, and in either red or green colors.
Front/rear sets usually comprise, but not always, different colors between front/rear - so to make it easy to distinguish between them.

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