Primary Arms SLx 3-18x50mm FFP Gen II Rifle Scope - Illuminated ACSS Athena BPR MIL Reticle

Manufactured by Primary Arms
MPN: 610186
Manufactured by Primary Arms
4 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 Primary Arms 3-18x50mm Gen II first focal plane rifle scope was completely rebuilt from the ground up with a ton of new features offering even better optical clarity, enhanced durability, and improved turrets with a greater adjustment range and tactile clicks. The Gen 2 SLx 3-18x scope still offers the same close range capabilities with 35 feet field of view at 3x while being able to quickly adjust to 18x for those 1,000 yard shots. Additionally, the magnification ring has been updated to accept dovetail levers allowing the use of the Primary Arms Slide Mount Magnification Flip Lever. The first focal plane reticle means that all the hold overs and range estimations will be accurate no matter what magnification you are set at. This revamped SLx 3-18 rifle scope comes with 3 different reticles to choose from, so you can find the right set up for your needs and the 50mm objective lens lets in more light for better view of the target with an even larger eyebox. The Primary Arms SLx 3-18x50 Gen II riflescope adds more improvements to one of the best selling mid-power scopes and will sure to be right at home on your precision rifle.


  • First Focal Plane reticle is true at every magnification
  • Illuminated ACSS Athena BPR Mil reticle
  • 3-18x Magnification with 50mm objective lens
  • Provides better clarity and larger eye box
  • 30mm Tube diameter
  • Improved turrets with more adjustment range and accurate tracking
  • Tactile and audible clicks
  • 30mm main tube
  • 6 Illumination settings
  • Length: 13.6 in.
  • Weight: 32.4 oz. with battery
  • Waterproof, fog resistant, shock resistant
  • Scope caps included
  • Lifetime warranty

This 3-18x50mm SLx scope is equipped with the first focal plane ACSS Athena BPR MIL reticle, the world’s most precise reticle for use at extremely long ranges beyond 1,000 yards. With a holdover grid encompassing a full 50 MIL of drop, it’s easy to not just find the perfect hold over, but quickly recover and correct a missed shot by spotting the impact on the grid and adjusting your aim accordingly. Fine aiming dots are displayed in 1 MIL increments, making ranging and hold overs a breeze. When the reticle is tied in with a ballistic calculator, even advanced calculations like spin drift and Coriolis effect can be accounted for and applied to a firing solution without ever touching a turret! For those who prefer to count their clicks, the 0.1 MIL adjustments match perfectly with the MIL based reticle. This handy reticle is compatible with any caliber!

Featuring improved optical performance with larger eye box, enhanced turrets, and an exceptionally durable construction, the 3-18x50 Gen II FFP Scope with ACSS Athena BPR MIL reticle is backed up by the Primary Arms Lifetime Warranty.

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Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Click Value0.1 Mil
Exit Pupil DiameterLow: 8mm / High: 2.8mm
Eye ReliefLow: 3.5in. / High: 3.9in.
Field View 100Low: 35ft. / High: 5.9ft.
Focal PlaneFirst Focal Plane
Length13.6 in.
Magnification3X - 18X
Mount Compatibility30mm
Night Vision CompatibleNon-Compatible
Objective Diameter50mm
Optic SeriesSLx
Reticle ColorRed
Reticle TypeMRAD
Total Elevation Adjustment100 MOA
Total Windage Adjustment64 MOA
Tube Diameter30mm
Turret Features
Weight32.04 oz.
  • SLx 3-18x Gen II Product Overview
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

Ratings & Reviews

4 reviews

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Primary Arms SLX 3-18x50 FFP GenII

by -

Optics is very well built with a robust and attractive finish. Elevation stop is very easy to set once you are zeroed. Glass is crystal clear in low light and zoomed.

Only con is the magnification adjustment is very stiff. This is good in case you accidentally bump it but it’s a little too stiff for precision rifle setup where you need to zoom in and out for target identification without moving the weapon system from yiur observation point.

All in all, it’s defiantly worth the money and I would definitely by again. You will nit find another optic with the clarity in low light this optic displays in a comparable price point.

Seriously impressive optic


I expected this scope to be a basic upgrade over the gen 1 3-18 SLX series, but this was way more than that. This scope punches way above its class. I don't know how PA does it at this price point of about 500 bucks but the glass on this scope is crystal clear at all ranges/ mags. This is right up there with comparable Philippine made glass. ( I compared it to my GLX 4-16) On top of that, the Athena BPR/MIL reticle is fantastic , allowing for highly precise shots at substantial ranges. The reticle is also daylight "visible " if you will not quite daylight bright like the NOVA is. I took this scope out to 600 yards today and was able to make out a very sharp and detailed image of a pine tree with no noticeable chromatic aberration. I was easily able to count each pine cone in that tree and notice illustrious detail on each pine cone. Id say the only noticeable downside was that when dialed up to 18X, the eye box is pretty tight not bad though.

Great Buy!

by -

I have yet to test this scope at the range, but I can say that this scope is built like a tank, and has every option for ranging a target and adjustments for for hold that you would ever need.
This scope is built using the mil rad adjustment system, if you have you used a mil dot scope it's the same basic system, if you use the SMOA system just remember that one mil equal's 3.6 inches.
The only thing that would make this scope perfect in my opinion would be if they included a sunshade or even better a kill flash, but they didn't.
So theirs room for improvements.

SLX Gen 2 3-18 FFP/Athena BPR

by -

This is hands down the best scope Ive had overall for $499. The glass clarity is seriously impressive- being that the glass is super natural and with colors that "pop". No chromatic aberration at all. I compared this scope with my GLX 4-16 and the clarity is basically identical. I really love the Athena BPR reticle , it's ideal for precision shooting. I also dig the XL turrets with nice crisp and tactile feel. The build quality itself - robust and substantial feel to it, very high quality overall. Im digging this scope, 5/5 stars all day long.