Long review but informative. Must buy. My affordable go to.

Good sights, well finished, easily installed, and durable. Notthe brightest glow but still pretty good. Sharp aim at night nice and bright.

The rear sight is below my trijicon rmr. They really aren't on target at any range zero (a couple inches low) to 50 yds (a foot low) shot in low light and was almost impossible to see my front sight. Does not fit glock 40 mos with red dot.

The problem is when i order these thru amazon, the sellers will send you ones that have tiny factory flaws. Attempted to return on amazon, of course they are not eligible for return. Probably pawning off their defective junk.

Just have to remember to turn off by turning the knob to g or r. Shot 50 rounds and held zero without any issues. Dont hesitate on this one.

This has multiple options to include the type of reticle and color with brightness options. Much quicker than open iron sights and very accurate.

The rail retention screws are threaded on a cheap lathe, my proof of this is that the threading doesn't conform to any identifiable us or metric thread pattern. Held zero on none.

I know it was cheap but was hopping it would at least work. Not wasting my time sending this back to the seller.