Chad Wallace

December 14, 2024

Optics, Review

Primary Arms SLx 1-10x28 ACSS NOVA

Chad Wallace

December 14, 2024

Optics, Review

Primary Arms

SLx 1-10x28 ACSS NOVA Review

A few years ago, Primary Arms started making their NOVA fiber dot reticle. This bridged the gap between the Low Power Variable Optic (LPVO) and the red dot. Primary Arms has recently put the NOVA reticle into their SLx 1-10x28 optic. This is huge for those wanting more magnification over the SLx 1-6x24 NOVA.

The Primary Arms SLx 1-10x28 NOVA is packed with features. For starters, they increased the tube to 34mm from 30mm’s in the 1-6. This allows more light to get into the optic and back to your eye. This larger tube lets you see better at lower light levels as well as at the full 10x magnification. They also throw in flip up lens caps to keep the glass clean when not in use.

Next on the feature list is the capped turrets. The turrets are a vital part in setting up your optic. Or at least getting it sighted in. I am not super thrilled with the turrets that Primary Arms uses on this LPVO. The clicks are fine and can be felt easily. My gripe is that they remind me of something that was used on scopes 20 years ago. They are small plastic knobs with a flat piece of metal that rotates to set your zero position. Then there is a tiny recess, in the threads, to line up your “zero” with. I was just hoping for something more like the SLx 1-6x24 NOVA. The caps that cover the turrets are nice. They have good texture to unscrew them. The windage knob cap also has storage for an extra 2032 battery. Yes, it comes with an extra battery already in the cap. On the left side of the LPVO is the brightness knob. It has 11 brightness settings from low light to burn your eyeballs out bright. However, it is not night vision compatible. The SLx 1-10 does not have Primary Arms’ Autolive. However, I did install their Autolive battery cap and it works like a charm.

Eye relief for the SLx 1-10 LPVO is pretty good. Primary Arms states 3.2 - 3.5 inches, which seems about right. I did notice that the eyebox is pretty forgiving. I did not need to be exactly in the stated window to see through the optic clearly. The SLx also has a fast focus diopter so you can adjust the reticle to be crystal clear. Also, on this end of the optic is the magnification throw lever. Of course it goes from a true 1x all the way to 10x. The magnification adjustment is very smooth and rotates right at 180 degrees from 1x - 10x. Primary Arms also uses their removable throw lever. This one is about ¾ inch long. You can get different height ones from Primary Arms, as well as a fold down lever.

Now it is reticle time. The SLx 1-10x28 uses Primary Arms ACSS NOVA fiber wire reticle. This gives you a daylight bright red dot in the center of the reticle’s crosshairs. Basically a red LED travels through a fiber optic cable to the reticle, thus illuminating the reticle dot much brighter than a normal illuminated reticle. The center dot is roughly 0.6 MOA. Some people say the dot is too small to use it like a red dot. I am not one of those people, I love the Nova red dot. The rest of the ACSS NOVA reticle is a Mil based Second Focal Plane optic. So the reticle stays the same size throughout the magnification range. This also makes the Mil subtensions only accurate at the highest power, or 10x in this case. For elevation, there are 4 mil stadia lines below the center red dot. They are spaced 1 Mil apart, with ½ mil dots between them. These Mil stadia are wider at the top and progressively get narrower as you go down the reticle. This is so you can use them to range distance on an 18 inch wide target. On the horizontal stadia, there are 2 dots. These 2 dots represent approximately 3 mile per hour wind holds each. The crosshair taper can be used as a 3rd wind hold. The reticle is very useful for all kinds of things. I am a huge fan of the ACSS NOVA Mil reticle.

When I first received the SLx 1-10x28, I had not received the rifle I was hoping to put it on. Since I had a “Range Day” competition coming up, I mounted it to my Primary Weapons piston AR15. Primary Arms had also sent their GLx 34 mm cantilever mount to use with the 1-10. It is a great mount by itself and puts the optic at just the right height for an AR. During the competition, I was able to use it like a red dot at 3-7 yard targets. Then I moved it up to about 3x to shoot some index cards at 50 yards. The optic performed great for that particular competition. And no, I didn’t win anything. The SLx 1-10 Nova now sits on a Global Ordnance Monolith, which was the rifle I was waiting to install it on. The 1-10 fits the rifle well and doesn’t add too much weight to it. After all, the SLx 1-10x28 Nova only weighs 19 ounces. I have also done a bunch of drills with the SLx on this rifle. The SLx worked great on it also. When I was shooting for groups, I had the SLx’s magnification turned up to 10x. On 10x the targets were easy to make out. The only problem I ran across was that at 10x, the scope is not as clear as at 1x. There was not a bunch of difference, but enough that I could notice. Even though it was noticeable to me, I could still make out 22 caliber holes at 100 yards easily enough.

I am a huge fan of the ACSS NOVA reticle in the SLx 1-10x28. Not only can you use this LPVO as a normal optic, it also can double as a red dot. You can even range targets with the Mil reticle. Pair it with the Primary Arms Autolive battery cap and you have an optic that is ready to go when you are. So if you are looking for that LPVO that has a little bit more magnification, but still can be used fast and up close, give the Primary Arms SLx 1-10x28 ACSS NOVA a look.

Firearms Insider Reviews - Key Points

Claim to Fame:

Quality , inexpensive 1-10x optic with good features

Target Market:

Anyone wanting a quality LPVO at a fair price

Features, Benefits, and Specifications of this product:

Battery Type: CR2032 3V Lithium Coin
Click Value: 1/2 MOA
Exit Pupil Diameter: Low: 9mm / High: 2.8mm
Field View 100: Low: 110 ft / High: 10 ft
Focal Plane: Second Focal Plane
Illuminated MRAD NOVA fiber reticle, red color
Eye Relief: 3.2” - 3.5”
Length: 10.5 in.
Magnification: 1X - 10X
34mm tube
Objective Diameter: 28mm
Total Elevation and Windage Adjustment: 40 MOA
Low Profile Capped Turrets
Warranty: Lifetime
Weight: 19.1 oz.

What other aesthetic options or finishes are available?

ACSS Raptor and ACSS Griffin reticles

What others are saying?:

5 out of 5 stars at PrimaryArms.com

Coyote Hunting 25-200 Yards

by Coyote Cam -

So, as we all know... the SLx 1-6x24 Nova has been the standard for the red dot bright LPVO with the Gen4. When I saw that they now make the exact same Nova illumination in the 1-10x28, it was time to pull the trigger on a 1-10x LPVO, but with any 1-10x I was a bit hesitant at first... but let me tell you, I am amazed at how clear this is out to 200 yards on 10x.

Now... understand that this is for my dedicated Coyote setup out to 200 yards max, but also I have a heavy brush/timber area that I need to dial it back on and this 1x is running amazing.

The red dot illumination helps when the reticle fades in the sun/tree line, which is why I wanted the Nova, but I needed more than 6x for target identification in dim light.

If you are wanting something for the same reasons as I did, do not hesitate, the glass is actually super clear.

Link to other reviews:

Lynx Defense

Price point:

MSRP = $449.99

Retail = Same, but Primary Arms runs sales that take it below $400

I need it now! Availability:

Primary Arms or your local dealer

Our Rating:

Pros:

Red Dot NOVA reticle
Mil lines for ranging
Lightweight for size
Battery storage in windage knob cover
Capped turrets
Decent throw lever

Cons:

Old school turrets with no real zero setting
Little fuzzy around the edges at 10x

Score: 8.00 Great

Favorite Link: Primary Arms SLx 1-6x24 Nov review

Chad Wallace

April 2, 2023

Review

Primary Arms SLx MD-25 gen 2 red dot

Chad Wallace

April 2, 2023

Review

Primary Arms has updated their SLx MD-25 red dot optic to a Gen 2. The Gen 2 gives you all the great stuff as the first generation, but it now includes Primary Arms’ AutoLIve. With the added AutoLive function, this makes a great red dot for either a rifle or carbine. There are two versions available, one with just a red dot, or one with an ACSS reticle. I received the ACSS version, so everything here will be on the MD-25 Gen 2 with the ACSS CQB reticle. Most of the specifications, except the reticle, apply to the dot only version of the MD-25 Gen 2 also.

Let’s start this out with an AutoLive explanation. The AutoLive function, of the MD-25 Gen 2, automatically turns the red dot “On” when you pick up or move the optic. It also turns the optic into a sleep, or “Off” mode, after a few minutes of no movement. A big advantage to an auto-on reticle/dot is that it is ready when you need it to be. The AutoLive also extends the battery life, since your optic isn’t “on” all the time. Whatever setting the brightness dial is set to, is the brightness that it turns on at. No readjusting necessary. I absolutely love the AutoLive function. Speaking of brightness, the MD-25 Gen 2 has 11 adjustments on a dial. From night vision compatible all the way up to super bright. The 2032 battery is also housed in the brightness dial. Primary Arms specs the battery life at 12000 hours on the medium setting, so 5 or 6 on the dial. Battery life might seem a little low to some people, but there is more information in the ACSS reticle. For comparison, the MD-25 Gen 2 dot only version has a 50000 hour battery life.

This particular MD-25 Gen 2 has the ACSS CQB reticle. If you don’t know anything about the Primary Arms ACSS reticles, they are usually a horseshoe line around some sort of chevron (think triangle). The horseshoe on the Gen 2 measures 65 MOA. The chevron triangle sits inside the horseshoe and is used as your main aiming spot. For close up work, just cover the target with the chevron. For more precise work, use the top point of the chevron. The ACSS CQB then has three dots below the chevron. These dot’s are for ranging, as is the bottom of the chevron. The reticle can work with a few different common caliber options as seen in the photo. I like the ACSS CQB reticle, but it is pretty small, so it can be difficult to make out the aiming points for different ranges. The MD-25 Gen 2 is still a red dot style optic. So this means that the image is projected onto the viewing surface. It is not an etched reticle like a scope. This really only affects you if you have an astigmatism, which I do. So for me, the chevron “starbursts” out and looks more like a dot. This is just something to take into consideration. If you have decent vision, the reticle will be very clear. For my use, the MD-25 Gen 2 is not a long range optic, so this doesn’t bother me at all. When shooting real close targets, an advantage to the ACSS CQB reticle is that you can figure out how far above a target you need to aim, to compensate for mechanical offset. Those dots below the chevron, as well as the 65 MOA horseshoe, also help for aiming at those close targets. You don’t have this option with a standard dot only reticle, which is why I feel the ACSS CQB is a better reticle option for an AR rifle.

The Gen 2 MD-25 is not one of those super tiny red dot optics. I’d say it is medium size. Not so small that it’s hard to see through, and not so large that it’s a tank sitting on your picatinny rail. It only measures 3” long, so almost half the length of those expensive “red dots”. The MD-25 uses 25 mm lenses, but the field of view is really good. Primary Arms says it rivals 30 mm red dots, and I believe it after looking through the MD-25. Even though the MD-25 isn’t a small red dot, it still only tips the scales at 6.5 ounces. It also comes with different mounting height options. So no matter what you put it on, you can get the sight right up to your eye level. If for some reason you don’t like the supplied mount, the MD-25 can be mounted on standard T1 And T2 micro mounts.

I’ve been really impressed with the MD-25 Gen 2. It is built super strong. I’m not sure I could break it if I tried. Even if I was to, it’s covered by Primary Arms’ lifetime warranty. The little capped turrets even have raised nubs to keep them protected. These protection nubs will also keep stuff from snagging on the turrets, or at least help. The little turret caps also are aggressively textured with an adjustment built into them for making sight adjustments. The mount is also super strong. Once clamped down, the MD-25 isn’t going anywhere. I wouldn’t hesitate to put this on a rifle that gets beat around some.

If you are looking for a rugged red dot, that’s not a dot, look into the Primary Arms MD-25 Gen 2 ACSS. This thing is a great size for almost any rifle. It has a ranging type ACSS reticle that even works with a .22 lr. The AutoLive gives you plenty of battery life, over a years worth, and it makes the optic “always ready”. Go check out the SLx MD-25 Gen 2 over at Primary Arms, It’s a good red dot style sight with a unique reticle.

Firearms Insider Reviews - 8 Key Points

Claim to Fame:

Larger window red dot

Target Market:

Those wanting an auto on/off red dot with a ranging reticle

FNBs (Features & Benefits of this product):

AutoLive functionality
Wide field of view
ACSS CQB reticle
Up to 12,000 hour battery life at medium setting
Uses one CR2032 battery (included)
Next generation ruggedized mounting system
Includes risers and spacers for mounting to 0.96”, 1.41”, 1.54”, or 1.64” central height
Compatible with standard micro mounts
Fully multi-coated anti-reflective lenses
12 Illumination settings, night vision compatible
3" long
Weight - 6.5 Oz.
Fog resistant
0.5 MOA adjustments
Lifetime Warranty

What other aesthetic options or finishes are available?

Dot Only version

What others are saying?:

5/5 stars on Primaryarms.com

This is my 5th or 6th scope purchase from PA. I've never been disappointed yet, so when this one was announced I quickly put it on pre-order to replace a Vortex SPARC that I've never been happy with. I bought this to go on a home defense bullpup shotgun. It is fantastic for this purpose. The big outer circle, with the small aiming dot in the middle, is perfect for fast sight acquisition, and the shake-awake feature gives you one less thing to think about in a crisis situation. The included height adjustment plates let you tailor the height of the sight to your own weapon and preferences. Just another area where PA beats the competition in quality, value, and price. With eleven brightness settings on this reticle, you see it outside in the brightest sun, all the way down to night vision compatibility. I usually prefer green illumination over red, but this sight is extremely clear and my old eyes have no problems with it. - Highly recommended.