To me, it seemed like something that added more capabilities to your rifle than a traditional red dot.
Whats in the Box
The optic comes with a one-third co-witness mount and a low mount.
Frankly, the ACSS is very cool.
The Primary Arms Holosun 503G uses the above ACSS CQB reticle that is designed to provide accurate bullet drop compensation for a range of cartridges. Image: Primary Arms
The standard aiming point isnt just a dot, its a chevron where the top point is your zero.
Then below the chevron is a BDC reticle with three dots to help you account for bullet drop.
it’s possible for you to turn it off by holding the minus button for three seconds.
The Holosun HS503G ACSS has a 6061 T6 Aluminum Housing and has an IP67 waterproof rating.
The 65 MOA ring represents a shotguns pattern spread at 25 yards, and just makes CQB shooting easier.
The optic can be turned off manually, and it has auto shut-off and shake awake.
Our emitter is lighting up more surface area here so, naturally, it will drain your battery more.
The above chart shows how to use the reticle with different loads to compensate for bullet drop over distance. Image: Primary Arms
According to the box, you might expect about 20,000 hours of constant life out of this optic.
We zeroed this optic for 5.56 and we used a 100-yard zero distance.
Next, we moved to 400 yards.
When shooting with the Holosun HS503G ACSS, it can be helpful to dim the red dot down to a barely visible level for maximum precision at longer ranges.
At this distance, you will need to shoot with the top dot.
The reticle works just like they advertised it would.
We hit with no problem at the distances of 300 to 600 yards.
The objective of the optic is glass and has a reflective coating. The optic comes with a⅓ co-witness mount.
Conclusion
In our opinion, the Holosun HS503G ACSS CQB is the do-it-all red dot.
It can also work with a wide range of firearms and chamberings.
Go to forum thread
Primary ArmsHolosun Paralow HS503G Red Dot Sight with ACSS CQB Reticle
SAINTEdge
When the authors shot at 300 yards, they were able to shoot from the prone, kneeling, and standing off-hand positions with minimal effort with the Holosun mounted on a SAINT Edge.
Sighting in the red dot at 100 yards with no magnification can be a bit of a challenge. Just be prepared as it will take a few rounds to get it where you want it, but it is doable with patience.
