I put a brushed stainless steel on my 40cal long slide Glock because I wanted to match the slide from lone wolf. I actually prefer the all black back plate. I found for me anyway it draws attention away from my eye when aiming. But I am not very disciplined obviously.
Sights, yeah, I don't like stock sights hardly on any guns anymore. Night sights for me when I can!
I never mess with the trigger. Some people polish the parts of the trigger to "tune" it. I did this on my 10mm and found no change except it was shiny. No value, you would have to change out trigger to get a true trigger job. Not worth it at all. On a striker fired gun a trigger job is pointless IMO.
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