Great stand alone sights - Daniel Defense A1.5 Top Mounted Fixed Iron Sight

I use these on a AR pistol build. I find them very sturdy and durable. They hold zero and are very easy to adjust for both windage and elevation. Another plus is that they do not require any special tools to install. A simple flat bladed screwdriver is all you need and this can be found on any knife or multitool. Because they are fixed (non-flip up) I do not pair with an optic. They are large and would obscure most of the view threw the optic. That being said they are excellent to run as a stand alone sight on a PDW or AR style pistol. For those looking to shoot both distance and quick close range it has 2 different aperture sizes. Lastly, the front sight has a comfortable rounded shape that on shorter rifles is a nice tactile reference point for your thumb.