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.