Holosun with a bdc - Holosun Paralow HS503G Reticle Red Dot Sight

First off, it’s an HS503, it’s what you’d expect from Holosun. The glass is fine, the dot is bright and easy to acquire, and it’s lightweight. The reticle, on the other hand, needs some explanation. First off, you need to have a 3x or better magnifier (I use a 5x). The BDC is pointless without magnification. Once magnified, however, it’s quite good. There are no visual aberrations or distortion and the BDC is easy to use. Zero the top of the chevron at 100 yards/meters and consult the included BDC chart for your caliber.