Great option if you want something simple and affordable - ADE Advanced Optics Ultra Compact Pistol Green Laser Gun Sight

I didn’t want to spend a lot but still needed something that would work reliably, and this ended up being a really good middle ground, with a bright beam, solid mounting, and easy adjustments, and what I like most is that it doesn’t try to do too much—it’s just a straightforward, functional laser that performs consistently, which is really all I was looking for.