Isn't this something similar to what Sig came out with a couple of years ago on the P365?They arent expensive either.
$150ish, depending on the type of pistol.
Innovative Fiber-Tritium Optical Pistol Sight
Meprolight’s engineering team utilized a patented optical illumination application to create the Mepro FT Bullseye™ — the smallest reflex style optic for pistols — featuring a bullseye point of aim indicator; highly visible, day, low-light or night time. The fiber-optic provides bright...shop.meprolight.com