It’s not a glock, but I carry this Iver Johnson .38S&W most days and when I cut it down a brass bead seemed like the logically way to go to replace the front sight.
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There’s no way to equal the utility of a self-luminous sight with a brass or gold bead, but it’s much better than standard sights that lack contrast. Having just about any ambient light makes it easy to pick up on the bead.
One thing I couldn’t say is if a simple blaze orange dab or stripe wouldn’t be just as good or better. I suppose it would come down to the particulars of which gun it’s going on.