The Holosun Paralow HS503G Red Dot Sight is a joint design from Primary Arms and Holosun, one of the largest optics manufacturers in the world. What’s innovative is that it uses PA’s ACSS CQB reticle in a red dot sight. Why does this matter? Big Red dot sights are great up close but less useful at distances beyond 100 yards. Essentially at longer distances the dot becomes too large to aim with precision. It ends up covering the whole target so you really can’t get a bead on what you’re aiming for. The solution at a longer distance is a small dot used in combination with a magnifier. However that equation might be slower going if you’re acquiring a target at close range. The ACSS reticle solves the problem by using a large chevron that the eye easily picks up for close shooting. (At longer distances, you can use the tip of the chevron as an aim point perfect for precise shots).
Using “zero” ranges of 25, 50, or 100 yards, the ACSS BDC is compatible with the following calibers:
- 5.56 NATO / 5.45×39 from 100 to 600 yards
- 300 BLK / 7.62×39 from 50 to 450 yards
- 12 gauge 1 oz. slug from 25 to 150 yards
- 7.62x54R from 100 to 600 yards
- 7.62 NATO / .308 Win from 100 to 600 yards
- 300 BLK 220 gr subsonic from 50 to 150 yards
- .22LR 40 gr from 50 to 175 yards
- 9mm carbine 115gr from 25 to 200 yards