I agree with Waveform. I have a XS Standard Dot on my SP101 and it is plenty prominent and I am retired and don't have the best eyesight. I had a factory sight with flourescent orange paint on it. The standard sight is .155" tall which is not the most prominent of sights.
I went to the flea market and found a $0.99 bottle of fluorescent orange nail polish and painted my front sight. It shows up great and is plenty durable.
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