Holosun Paralow HS503G Red Dot Sight - ACSS CQB Reticle
- HS503G-ACSS overview with Dimitri Mikroulis
- HS503G Red Dot ACSS by SuperSetCA
- ACSS CQB micro explained by Dimitri Mikroulis
- Holosun 503G Review by MrGunsNGear
- Holosun ACSS Red Dot Review by Sootch00
The ACSS features three BDC dots underneath the chevron, allowing an unprecedented 600 yards of bullet drop compensation in 7.62 NATO or 5.56 NATO calibers. Auto ranging and wind leads are also incorporated into this smart reticle. A CQB horseshoe grabs the eye instantly for close quarters shooting and also approximates the spread pattern of 00 buckshot at 25 yards. The reticle for this sight is a central 2 MOA dot, centered in a 65 MOA circle with four positioning points. The diameter of the circle reticle represents approximately 5'5" at 100 yards 170cm at 100m.
The HS503G is a proven micro dot sight with an auto-on function that switches on the power with a slight movement of the sight. It comes with a 1913 Picatinny base which is removable, revealing an Aimpoint Micro-compatible base underneath. It also comes with the lower 1/3rd co-witness riser mount shown in the photos.
Exclusive to PrimaryArms.com and Primary Arms authorized dealers.
Using "zero" ranges of 25, 50, or 100 yards, the ACSS BDC is compatible with the following calibers:
- 5.56 NATO / 5.45x39 from 100 to 600 yards
- 300 BLK / 7.62x39 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
Ratings & Reviews
Awesome with a magnifier
by Aaron -
This sight is awesome! I have some astigmatism so most red dots are fuzzy to me. Even the expensive brands like aimpoint look like a star burst. This sight is much easier to see when paired with a 3x magnifier. The reticle is very small without the magnifier. If you buy this you NEED a 3x magnifier. Thanks PA!
ACSS Red Dot, thumbs up!
by Charles -
I finally got to use my new Holosun with ACSS, after a long wait. When I got it, I was convinced i wasn't going to like it because of the reticle being so small. But at the range, all that went away, and it really proved to be a great red dot. I had no problems sighting with it, and even though a magnifier would make this top notch for distance (in its class of course), it wasn't at all necessary for 100 meters or less.
<br>Also, I had no problems seeing it in the full sun, with the setting on 4 or 5. Great optic, and I can't wait to put a magnifier behind it. Primary Arms delivers as always. (And Holosun, gotta give them their props too)
Not for eyes with an astigmatism
by Matthew -
If you have an astigmatism then this optic is not for you... If not, it is a really nice little red dot. I have an astigmatism and never really had an issue with a red dot before, maybe a little splaying but never enough to make me not accurate. Initially looking into this optic, my eye just made it a blurry mess. I thought it was a bad optic until i looked at it through a magnifier and it was crisp and excellent. Flip the magnifier and instantly blurry. Keep this in mind if you buy this optic, it may be your eyes that are the issue.
Great value, great function
Everything works as advertised, and this unit is a great value. I had never used a red dot before, and it took my eyes a few minutes to adjust.
<br>The size of the chevron is a bit of a double edged sword. It's pretty tiny, which makes it very accurate, but hard to see the details of unless you're sitting perfectly still.
<br>In the end, I'm shooting tight groups out to 100yrds with no magnification. It holds zero, has a light setting for every condition, doesn't blur when you turn the light up, and is very easy to adjust. For this price, you couldn't ask for much more.
The best reasonably priced red dot.
by Mike -
I have two of these now and like them a lot; one using the supplied mount and the other using a Holosun absolute co-witness mount on an AR15. No issues with either mount. My only criticism (and it's not really one) is that the reticle is so fine (1moa) that it's not very useful at 100+ yards. Problem solved with a flip-to-side magnifier. Will probably buy more of these in the future.
Holosun NEEDS to check on their mount screw quality!
The red dot sight itself is great, but the mount is terrible. First range trip with the sight saw the screw connecting the mount to the rail snap right in half. It was properly torqued with blue loctite. I then used the screw from the second mount that comes in the box figuring this was a freak occurrence, torqued with blue loctite. I let it cure, then I come back to it a week later, and just the force of charging the rifle snapped this second mount screw (before I fired any shots). Very disappointed in the mounts, particularly the screws, that ship with this product.
Quality Control Sucks
by Wade -
I just received this today and nothing worked as it should. The chevron was blurry and there were two lines of dots very blurry and the horseshoe would not come on. It seems there is no Quality Control thru Primary Arms and they are sending out goods made in China without checking them for function. I'm sending it back and requesting that the new one has a note in the box saying it was functioning properly. The box it came in had no seals on it, so it should not be too much of a problem to open them and make sure they work before sending them out.
<br>From PA: Although this is branded Holosun, it has our reticle so we do check 100% of them. The horseshoe comes on separately and you will find instructions in the manual. Or give us a call. We want you to be 100% happy with the sight.
by Ron B (from Maine) -
I own several of these sights and all have performed exceptionally well. Just ordered another one one sale. Glass is clear, reticle is sharp and the hardware is rugged. AR's, SBR's, Shotguns... loving a quality optic that's affordable enough that I can have the same sights on multiple guns. Thanks PA!
by martin -
Over the last several months I have ordered 10 of these scopes.
<br>6 of the ten scopes have not had the horseshoe in the reticle.
<br>I think I will be sticking with the primary arms brand from now on.
by Mike -
The micro chevron reticle is quite small, which is a benefit as it provides extra precision. I'm using it with a flip-out magnifier on an AR9 and it works great. I like how many levels of brightness this red dot has, and the fact that it has motion sensing so you can basically leave it on all the time.
Hands down best tactical sight for the money
by Adam -
Did a great deal of reading and YouTube research before going with this optic. I'm candidly thrilled with the capability of precision. I'm using it without the magnifier and shooting 1 MOA dependably. And yes, the reticle is small, but very usable. Great battery life.
Waste of money
by B -
Not even worth 1 star. Not able to make out the chevron, could not make out the bdc, it looks like a big asterix covers the whole retical. Maybe I just received a broken unit, but that does not matter when you had a big range weekend you are looking forward to. I should have trusted my instincts when it said made in china. I will be sending this back first thing Monday morning.
Great Red Dot! (but not great windage/elevation turrets)
by peter -
GOOD<br>- ACSS reticle in a red dot is basically the best thing ever. This reticle is perfect. In fact, I hope Aimpoint/Trijicon puts this in their small red dots. Combined w/ a magnifier, this is a seriously great carbine optic<br>- Battery life - I've had mine on for over 7 months now (with the horseshoe on for most of that). No noticeable dimming. Seems to be as advertised.<br>- Nice mount - Screw requires a T10 torx, but it is very repeatable and holds zero. Taken it off and put it back on more than 20 times and it stays true.<br>- Bright day daytime visible<br><br>BAD<br>- Squishy wind & elev. YMMV, but my elev knob in particular has almost no positive clicks as it is turned. It's usable, it holds zero, and adjustments are 1/2 MOA. However, it is very squishy and sometimes there is no click at all. This is not a deal killer by any means, but this is where the price point shows, and is also why I didn't give the HS503G 5 stars.<br>- No retention for windage/elevation caps. These are easy to lose.
Initially very excited about this optic. Clarity was great and more crisp than other red dots I own. However with only 200 rounds of 556 something must have shaken a circuit loose in the optic because it is no longer functioning. A battery change did not fix the problem. Sent it back to PA hoping I just got a dud unit. Hopefully a more positive review will follow with the replacement unit.
Buy it!!! You will be totally satisfied!!!
by Joey -
Wow!! Simply awesome. Hard to believe the couple of poor reviews. Mine is much better that what I expected for $220. I'm sure there are a few bad ones but Primary Arms will fix that in a hurry so its hard to believe.
Exceeded my Expectations
by Daniel -
Pros<br>- Stands up to hard abuse.<br>- Horseshoe makes a night and day difference for CQB target acquisition<br>- Looks great through Night Vision<br>- Works great for 5.56 and .308. Works even better for .300 BO<br>Cons<br>-Slight orange glare if the sun hits it just right while a witch is performing a spell to try and through you off your game<br><br>If you're thinking about spending money on an Aimpoint, Trijicon, or Eotech, then don't. You're reading this review because you're having second thoughts about spending that much money on an optic, so buy this Holosun instead. The glass and reticle are incredibly clear. The horseshoe does a better job for CQB than Eotech, the ACSS reticle does as good of a job as a Trijiconfor reaching out, and the battery life is on par with an aimpoint. If you're worried about ruggedness, then don't. This sight has been run through the gauntlet and the dings and dents I have put in it have not caused it to lose zero once or not turn on.
Sold my MROs and Aimpoints
While this is a budget friendly optic, the build quality is exceptional for the price point. I beat up my optics by throwing them in my bags, accidently dropping my firearms, tossing multiple firearms and items in my bags. I travel to and from indoor and outdoor ranges in temperatures ranging from 10f to 105f and not once during my year of ownership has my original 50/200 zero strayed or been lost on any of my Holosun optics. In my year of ownership, I have not yet needed to change my battery.
<br>The lens objective is 20mm. The glass is clear with little to no blue/green tint and handles sun glare extremely well during my bright outdoor shooting adventures. The reticle brightness even goes plenty bright to shoot outdoors in the bright sun during any time of the day. I seriously have no complaints on how it handles the sun. Both (to my eyes) seem to be a true 1x for magnification.
<br>Seriously, I'm a huge fan of Holosun and sold my Trijicon MROs and Aimpoint's for these.
Update to earlier post - 11/15/2016 4:25 pm
Bought two of these Sights
<br>1. Put one on a DP-12 shotgun. The ring and chevron are perfect for this weapon. Groups of 1" @ 25ys (slugs).
<br>2. 2nd sight is on a .300 BO pistol. I did add the following :
<br>--Primary Arms Advanced 3X Long Eye Relief Magnifier, Black PA3XLER-AD. It is functional as close as 15ft. 100yds is unbelievably clear! I'm not a great shot, but my normal group at 50- 1/2", and 100- 1.5".
<br>--Primary Arms Quick Detachable Flip To Side Mounts - Standard Height, Black PAQDMQF-01. This is NOT "slap to the side" mount, but I don't need that. It is "move to the side" and that works for me.
GREAT OPTIC GREAT PRICE GREAT SERVICE = HAPPY
by Aj -
Couldn't be happier very nice optic nice features love the chevron priced just right... have a PA 6X Magnifier with QD mount sighted in at 100yds 1/2 moa grouping. Touchin 2in plates at 200yds in no time . Primary Arms customer service is amazing will be coming back !
Mount broke after two shots
by Raghorn -
So far the site works great. Fit and finish on par with my T1 and T2. The red dots crispness is as good if not better than the T2 (which is improved over the T1) and much better than the eotech that this sight is replacing. If it proves to be as durable as the aimpoint then it will be a great sight for years to come.
<br>Now the one big negative ......the mount. It looks great, fits great, but broke after two shots on a 300BLkout. Took two sight in shots, then reached up to remove the elevation cap and the sight fell off the gun into my hand. The screw broke off half way thru the threads in the base of the mount. I used and FAT wrench to torque it to about 20-25in/lbs and used blu 242 thread locker on install. SO needless to say I am extremely disappointed in the mount. Do yourself a favor and order a LaRue, Midwest or American Defense mount when you order this sight and you won't waste a trip to the range.
<br>5 stars for the red dot and 1 star for the mount.
Good to go
In my honest opinion which isn't an expert one for the price you can't beat this little red dot. It's packed with features and does its job what more can you ask for. Consistently hitting a 6 inch paper at 100 yards with my Tavorx95. Its also built very solid in my opinion it doesn't feel or look cheaply made like a lot of others in this value price range. I'm probably ordering another Holosun dot here in the near future and the customer service at Primary Arms is top notch.
The ACSS rectical is totally useless with out at least 2-3 power magnification.... False advertising dont fall for it ! Now with the magnification its a totally awsome ! But i dont want the additional weight ! Disappointing beyond belief !!!!
unbelievable for that price. got to test it out at the range today and it works flawlessly. i had ordered the hs403b and returned it because the dot was not sharp and it was distracting and the battery tray was sub par. this fixed all of those. reticle is tack sharp even in bright daylight with brightness all the way up. battery know is on the side under a screw cap and build is very robust for the price. other than reliability of the name it makes me wonder why other sights are so much more expensive.
Was having a lot of trouble deciding whether I wanted this or the 1-6x. I love how quick a red dot is. I wanted the distance of a scope. While a scope is better served trading long shots this particular red dot with a magnifier is actually a worthy competitor. That would be a ridiculous thing to say with any other red dot. This one will obviously not be as ideal when taking a long shot but imagine having the reasonable ability to do so but then have ask the advantages and more of a red dot. The reticle is freaking sweet. With the circle dot it is very fast acquisition close range. At long ranges the chevron is awesome at finding that pin point you want to shoot to. Next thing. On a second focal plane scope the reticle is only really accurate on its last setting. So all the other power settings you have to toggle through to get to it are fine and all...but personally I'd rather just slap my magnifier over this red dot and be there immediately. I have the primary arms 3x ler. I plan on getting the 6x on a quick detach just for kicks. I'm loving the red dot. Get whatever you want...the 1-6x is still in my future but for now I got third and am glad I did. Get one of the two...heck get both. No regrets.
Great product and great customer service by Primary Arms as usual!
Received this red dot earlier this week and took it out to the range today. After shooting about 300 rounds I can say that I like this sight a lot. The ACSS reticle and the glass itself are crisp and clear. For the money spent I am definitely pleased. Beyond that I received it within 3 days of placing my order. A+ for PA!