I have a Trijicon. It cost more than the gun. It works good.
The next time I bought one, it looked just like the Trijicon, but was unmarked. It cost 20 bucks. It works just as good.
I realize that I bought chinacrap, but OTOH, Trijicon overpriced their products. If they had a semi-reasonable price, and if a China tariff were in effect, we would happily buy American.