Mine is solid - Primary Arms SLx MD-25 Rotary Knob 25mm Microdot Red Dot Sight

I’m reading all these negative reviews and I have not had the same experience. I have left it dunking since the si gel dot came out and it’s still on the same battery, field of view is good and I’ve put about 2k rounds down range using this optic on a CZ scorpion.

I then bought a second one for my AR and yes you can see the dots better with a magnifier for sure, but the donut of death is still really nice for CQB acquisition I do recommend them. But I do also own lots of optics they do have a home on two of my weapons though.