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Primary Arms SLx 1-6x24mm SFP Rifle Scope Gen III - Illuminated ACSS Aurora 5.56-Meter Reticle

Manufactured by Primary Arms
SKU: PA-SLX-1-6X24S-AUR-5.56-M
MPN: 610118
Manufactured by Primary Arms
17 Reviews

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

The Primary Arms 1-6x24 second focal plane scope (Gen III) features the exclusive, patented Advanced Combined Sighting System Aurora reticle. Bullet drop compensation, wind holds, moving target leads and range estimation are seamlessly integrated into an easy to use, instinctive sighting system that is very fast from 0-300 meters and very accurate from 300-800 meters. The second focal plane design keeps the reticle the same size at all magnifications for quick acquisition at low power and advanced reticle functionality at 6x maximum power. This Scope is protected by the Primary Arms Lifetime Warranty. If a defect due to materials or workmanship, or even normal wear and tear, has caused your product to malfunction, Primary Arms will either repair or replace your product.

  • Second Focal Plane ACSS Aurora 5.56 Meter reticle
  • 50-meter bullet drop compensation gradients to 800m
  • Integrated moving target leads for speeds up to 40mph
  • Full value wind holds for 5mph - 10mph winds from 400m to 800m
  • Automatic target ranging and BDC
  • BDC and ranging accurate at highest magnification setting
  • 1-6x total magnification range
  • Red illuminated with 11 brightness settings
  • Includes CR2032 battery
  • Single piece 6063 aluminum construction
  • Water and fog proof
  • More compact than older models
  • Hardcoat anodized matte black
  • Lifetime warranty

The ACSS Aurora reticle is the very first foray into meter-based ranging and fire solutions. The feature-rich and intuitive reticle design is uncluttered, designed to communicate vital information in an efficient manner to not only increase first-hit probability but drastically reduce the time necessary to reach a firing solution to get that hit. From 300m and in, the illuminated chevron aiming point provides wicked-quick snap shooting capability and both-eyes open engagement, so you never lose peripheral vision. The outer tips of the chevron pull double duty as leads for targets moving 3.1mph perpendicular to the shooter. For targets moving a bit faster, the two lead dots on either side of the chevron are leads for a target hustling along at 8.6mph. Aurora even compensates for mounted targets up to 40mph!

We knew the flagship Gen II 1-6x24 would be a tough act to follow, so they worked hard to make incremental but real improvements. The Gen III is 18mm shorter (10.04in long), weighs 1.88 ounces less (16.9 oz. total), and has an additional 10 MOA of internal adjustment compared to the older model.
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PA-SLX-1-6X24S-AUR-5.56-M MANUAL 1
PA-SLX-1-6X24S-AUR-5.56-M MANUAL 2


Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Click Value1/2 MOA
Exit Pupil DiameterLow: 9.00mm / High: 4.00mm
Eye ReliefLow: 3.50 in / High: 3.30 in
Field View 100Low: 110.00 ft / High: 19.30 ft
Focal PlaneSecond Focal Plane
Magnification1X - 6X
Night Vision CompatibleNon-Compatible
Objective Diameter24mm
Optic SeriesSLx
ReticleACSS AURORA 5.56 M
Reticle ColorRed
Reticle TypeBDC
Tube Diameter30mm
Weight16.9 Oz
PA-SLX-1-6X24S-AUR-5.56-M MANUAL 1
PA-SLX-1-6X24S-AUR-5.56-M MANUAL 2
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California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

17 reviews

  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews



Just received my new ACSS Aurora and have started to familiarize myself will all its capabilities. Holy Cow is this nice...Easily daylight bright. Nice glass. I was slightly hesitant about no horseshoe but my choice was, for me, absolutely perfect. Same with the choice of SFP vs FFP for my eyes.
<br>My only nit to pick so to speak, is it should made perfectly clear that the scope comes with both front and rear flip ups. No need to add in any flips when ordering.
<br>Other than that, Home Run!

Works Great!


Great clarity and the turrets track very well. Very little warping on the edges when using 1x. The illumination works great, gets bright, not red dot bright, but enough to contrast with a darker background or target during a sunny day. Only thing I needed was a mount and through lever. I really dig the Aurora reticle vs the standard ACSS my 2.5x has. Only thing I wish was that the reticle would illuminate both red or green, but that's me being nit picky.

Best reticle for multi calibers


the reticle is fantastic. For the paper in your wallet, it cant be beat. I wish they had this in 3-18 GLX (if they produced one) This is a meter based reticle. it is possible to use 308, 762x51 175 grn SMAK (2400 FPS) if you use a 20 MOA incline mount, this will match drop increments out to 800 yrds. Adjust ZERO 1.1" high (100yards) and hold points align out to 600 yards (not meters) past 600 aim lower as it has less drop than 556.
<br> MASS and BC matters. 556 effective range 500 meters 762 effective range 1000 yards (energy on target). 400 FOOT POUNDS OF ENERGY is the minimum standard to determine effective range. Bullet type, also efects energy delivery.FMJ,HP frangible

Great Scope!


Hope to see a version where the chevron is only illuminated and in front focal plane. Keep up the awesome work and producing quality optics!

Better than expected

by -

This is a great optic if you’re looking for LPVO in 2nd focal plane and metric ranging. Nice and clear, the eye box and eye relief are very good throughout the mag range; Even at 6x it is forgiving enough to use comfortably. Two ways to make this optic totally outstanding: add an extended adjust lever, and please only illuminate the chevron instead of the entire bdc. Highly recommended LPVO at this mag range and price point.

Almost perfect


This is a great optic and an amazing value. I think the glass is plenty clear, the reticle is perfect, the build is solid, the price is right. Great option if you’re looking for a SFP scope. Primary Arms, if you’re listening- please just illuminate the chevron portion of the reticle instead of the entire BDC. That would make this optic perfect.

Exactly what I had heard.

by -

A great scope for the price . Probably the better rectical out there. Just can’t beat it for the price

Best bargain for the money.

by -

Love the scope. It’s even better than I expected it to be. In my opinion, this is the closest thing you to an ACOG, without actually buying an ACOG. And with the lifetime warranty, there really is no argument for not buying this scope. Buy one now, and enjoy!

Great scope

by -

Love this scope this is the 4th scope I have bought from Primary Arms and I will continue to use all their products great price and outstanding quality 3 shots and my rifle was sighted in a nickel size group

1-6x24 Aurora


The Aurora reticil is one of my new favorites it’s definitely a simple do all , it has the Primary Arms ranging capabilities and accurate BDC , the larger chevron with the fine tip really helps pin point targets at distance and up close using the full Chevron running a cover and shoot works , I like the extra 5 mile an hour wind hold dot both are spot on , the scale ladders pretty much covers a lot of lead compensations you might have with faster moving targets and may make it seem a little busy but sense they’re tapered down my eye seems to automatically go to the center , glass is clear reticle is defined , great deal for the money