I have a TRS-25 (had a TRS-80 too....) I got 3 years ago, still going strong. Spent some time and about 400 rounds on my FAL, currently on my AR-9, about 1k rounds.
After reading about the "are they fixed yet" issues, when I had to replace a first gen PA dot (equiv to TRS-25, but 2moa dot vs 3) I went with the AT3 RD-50, no riser since it is on a Ruger Mk II w/ a no-drill&tap mount. So far excellent, about to buy another to go on an AR, 2moa dot lifetime warranty. Visible in full Florida summer sun at half brightness, clicks for adjustment are feel-able and audible, and it has a lifetime warranty. From what I can tell, this is the new best-under-$100 sight
https://www.at3tactical.com/products/at3-tactical-rd-50-micro-red-dot-sight-w-optional-riser-mount
$80ish on amazon with a riser to do lower 1/3 cowitness or dead-on cowitness.