Primary Arms SLx 1-6x24mm SFP Rifle Scope Gen IV - Illuminated ACSS Nova Fiber Wire Reticle - Red Dot Bright™

Manufactured by Primary Arms
MPN: 610183
Manufactured by Primary Arms
58 Reviews

In Stock

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This Primary Arms rifle scope is part of the SLx optics line. SLx optics have built a reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment.

The SLx® 1-6x24mm SFP Gen IV Rifle Scope is the latest iteration of their best-selling carbine optic, incorporating a fully upgraded optical system, an integrated dovetail throw lever, and all-new ACSS® reticles. With superior glass clarity and swift magnification controls, you’ll always have the power to identify, range, and engage your targets with unrivaled precision. This 1-6x low power variable optic features the ACSS NOVA Reticle. The ACSS NOVA is a purpose-built reticle that leverages a high-efficiency fiber optic wire for Red Dot Bright illumination. With built-in target ranging, MIL subtensions, and moving target leads, this reticle provides a broad, intuitive toolset for engaging targets from close quarters to long-range. Like all Primary Arms Optics products, this rifle scope comes with an industry-leading lifetime warranty and commitment to customer satisfaction.


  • Fully Upgraded Optical System
  • Integrated Magnification Throw Lever
  • ACSS NOVA Fiber Wire Reticle
  • Magnification: 1x – 6x (Min – Max)
  • Focal Plane: SFP
  • Objective Lens Diameter: 24mm
  • Exit Pupil: 10.6mm – 3.8mm
  • Eye Relief: 4 in.
  • Total Windage/Elevation Adjustment: 120 MOA
  • Field Of View @100 Yards: 120 ft. – 20 ft. (Low – High)
  • Illumination: Red, 11 Illumination Settings
  • Red Dot Bright illumination
  • Click Value: 0.1 MIL
  • Length w/o Lens Covers: 10.4 in.
  • Weight w/ Included Battery w/o Lens Covers: 17.9 oz.
  • Scope caps included
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Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Click Value0.1 Mil
Exit Pupil DiameterLow: 10.6mm / High: 3.8mm
Eye Relief4.00 in
Field View 100Low: 120 ft / High: 20 ft
Focal PlaneSecond Focal Plane
Length10.4 In.
Magnification1X - 6X
Mount Compatibility30mm
Objective Diameter24mm
Optic SeriesSLx
Reticle ColorRed
Reticle TypeMRAD
Total Elevation Adjustment120 MOA
Total Windage Adjustment120 MOA
Tube Diameter30mm
Turret FeaturesCapped Turrets, Low Profile, Tool Adjustable
Weight17.9 oz.
  • Product Showcase: SLx 1-6x24 Gen IV
  • Product Overview: SLx 1-6x24 Gen IV
  • Primary Arms SLX 1-6 Nova - The Everyman LPVO
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Ratings & Reviews

58 reviews


Can’t beat for the price!


Extremely impressed with this optic especially for the price. Glass is excellent, love the reticle and the fiber illumination is very bright and crisp. The magnification control is smooth and the scope adjustment dials have nice positive clicks to them. Scope also came with flip up lens covers which is a nice addition. Im definitely going to be ordering another one in the near future for another one of my rifles.

The new standard for budget LPVO's


Absolutely lives up to the hype, punches well above it's price point. Yeah, it's going to get compared a lot to the PST Gen 2, and I can honestly say the overall glass quality and image/FOV/Reticle, and illumination are frankly better than the Vortex. Still doesn't quite match the Vortex in build quality or external controls, and the eyebox is a tad less forgiving, but this Nova scope is hands down the best LPVO on the market under $500.

Extremely Impressed!

by -

First range trip today and I was very impressed! Bright dot, clear glass, easy adjustments. In fact, the glass at 6x was more crisp than my 10x42 binos. Only had 100 yd, but managed several groups with a fresh 223 wylde upper from .8-1.25", which I feel is great. Looking forward to taking it out a bit further to test the reticle.

Nice Work


Honestly, This device is proper!
Took it out, zeroed, and it did what it was designed to do. I don't have any others to compare it to right now but if this considered "good/budget" then I can only imagine what 1,000 LPVO has to offer.

No regrets and pleased.

- Eye box is a bit touchy (I wear glasses too).
- I purchased the longer throw lever. Much better



primary arms outdid themselves with this. i took a gamble on the pre order since they give a generous military discount. I do not regret it at all. reticle is CRISP. glass is beautiful. the fact that this is considered a budget LPVO is wild to me. this is the new gold standard for “budget” optics. you will not regret this purchase. buy with confidence.

Basically Perfect


PA is zeroing in on the perfect balance of qualities at this price point. I have nothing bad to say about what I paid for-- it's fast up close, clear far away. The eye box is still practical for running around. I have the Nova variant and the brightness is truly red dot or brighter bright. Controls are better than some far pricier scopes.

Whatever minor deficiencies this does have are not deficiencies at this price point. I would argue it's hard to find non-marginal performance differences until you're past $1000. If you are completing a build on a non-ultralight 14.5" or longer rifle and you don't care about night vision, stop futzing around with piggybacked RMRs and prisms and offsets. Put this on your gun. You will thank PA.

Hey PA! If you made a PLX version of this with reduced weight or finer I will buy two more of them. I don't need FFP or higher magnification powers, just this right here, but more of it.



If you're just getting into LPVO's this is your best bet. The reticle is simple and easy to read, with a red dot so bright I almost got flash burn on my cornea when I turned it on, with that being said the brigthness has 11 settings and it looks crisp and sharp on all of them. I have astigmatism and the Fiber Optic alows me to see it extremly well with no starburst whatsoever.
The optic has a solid feel to it with nice weight, nice audible clicks along with really clear glass make it easy to zero.
Whether you're a professional or a noob to the LPVO game you will love it. Also, the new shake awake battery cap will be coming out soon, and will be perfect for this setup.

Bang for buck


I’ll just compare this to the SLX 1-6 FFP raptor

Glass is clarity is good similar to the Raptor but not quite as good but it is also SFP vs FFP but there is a little more distortion at the outer edges in comparison but a non issue to me.
Bezel is thin significantly less than the Raptor
FOV is quite a bit less at all magnifications this was surprising.
Eye relief/scope shadow was not noticeably different to me.
Brightness this is basically red dot bright unlike the raptor that isn’t bad but not going to be lit up in all conditions.
Magnification at 1x it is obvious there is a slight magnification, the raptor feels pretty close to a true 1x.
The magnification ring is a bit stiff and the addition of the throw lever is nice but it’s sharp and not quite big enough for me.
Reticle simple, effective, and not cluttered at all.
If they come out with a 1-8 I’ll be getting one for sure.

Great for the money….except


Great scope for the money. Clear glass and a great reticle. Included lens covers are pretty nice. Small Cattail on the magnification ring works ok. But, If using it for competition and this is the “except”….the magnification ring is very stiff and most importantly… it moves the opposite of any other scope I’ve owned in 30 years. Weird….it actually moves right to left to magnify. Not sure I would have purchased it if I had known. Muscle memory if hard to change. Never saw this in any online reviews.

Best bang for buck


Killer optic. I've owned a bunch of LPVOs including Razor HD-E, Viper PST Gen 2, PST Gen 1, Trijicon TR24 & TR25, and a Steiner P4Xi.

I prefer this over the Viper PST Gen 2 and P4Xi. Size/weight, reticle, dot brightness, eye relief are all very good, although I find the eye box just a touch tighter when off-center than the aforementioned Viper PST Gen 2 and P4Xi.

You'll have to spend about twice as much to get an optic that's meaningfully better, in my opnion. PA really knocked it out of the park on this one.