Primary Arms SLx 4-16x44 FFP Rifle Scope - Illuminated R-Grid 2B Reticle

Manufactured by Primary Arms
MPN: 610122
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 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 4-16x44mm first focal plane illuminated rifle scope combines one of the most popular magnification ranges for hunting with the features and innovations you'd expect from Primary Arms. At 4x magnification, the wide field of view and daylight bright reticle make tracking a moving target a breeze, while the top end's 16x magnification allows for unerring precision. The reticle is etched into the first focal plane. This means it is 'true' at every magnification, ensuring the ranging, holdovers, and wind holds can be used as long as you can see them.

  • First Focal Plane reticle is true at every magnification
  • Partial reticle illumination is daylight bright
  • ACSS R-Grid 2B reticle provides auto ranging, fast close quarters engagement at low magnification, and an extensive MIL dot grid that offers 15 MILs of precise hold overs
  • Zero resettable turret caps
  • Chevron tip central aiming point provides infinitely small aiming point
  • Replaceable power ring fin can be positioned to user preference
  • 30mm main tube
  • Weight: 25.4 Oz. with battery, without lens covers
  • Waterproof, fog resistant, shock resistant
  • Lifetime warranty

This 4-16x44mm SLx scope is equipped with the ACSS R Grid 2B reticle. A marked improvement over the original R Grid, the 2B retains fan favorites like the horseshoe and chevron for up close snap shooting at low magnification, as well as the incredibly handy auto-ranging system. The original line grid has been replaced with a 0.1 MIL dot matrix grid to reduce clutter and allow for more precise holdover references for a full 15 MILs below the center. For shooters who want the best reticle for extreme range shooting without sacrificing speed up close, look no further than the ACSS R Grid 2B, compatible with ANY caliber.

The 4-16x44mm scope body is one of the most advanced to date, offering new innovative features, as well as old favorites. A removable and replaceable fin on the power ring allows for rapid adjustment of the magnification range just like a magnification lever, with the fin's placement entirely at the operator's discretion. The improved turrets have tactile and audible 0.1 MIL click adjustments. The illumination turret offers eleven settings. A smooth parallax adjustment and fast focus eyepiece work together to provide a perfectly crisp image of the target and reticle.

Featuring clear glass, forgiving eye relief/exit pupil characteristics, and efficient industrial design, the 4-16x44 FFP Scope with ACSS R-GRID 2B 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: 11.6 mm / High: 2.75 mm
Eye ReliefLow: 3.60 in / High: 3.90 in
Field View 100Low: 26.60 ft / High: 6.50 ft
Focal PlaneFirst Focal Plane
Magnification4X - 16X
Mount Compatibility30mm
Night Vision CompatibleNon-Compatible
Objective Diameter44mm
Optic SeriesSLx
Reticle ColorRed
Reticle TypeBDC
Total Elevation Adjustment24.7 MIL
Total Windage Adjustment24.7 MIL
Tube Diameter30mm
Turret FeaturesExposed Turrets, Tactical / Target Profile, Finger Adjustable, Zero Reset
Weight25.4 Oz.
  • Learn More About The Primary Arms SLx 4-16x44
  • SLx 4-16x44 Features and Reticle Options
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

  • 3 stars
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  • 1 star
  • 0 reviews

Awesome scope, even better reticle.


Really cant find anything to complain about with this one. The scope body and controls all seem to be holding up well and for the price point, provide fairly erganomic functions. The online description stated that there was no nightvision compatability but when the product arrived the scope had 2 nightvision illumination settings. This was also advertised on the product box. Not sure how or why but it was an upgrade in my eyes. The R-Grid 2B reticle is awesomely layed out and does a great job reducing clutter while still providing ample data. For the price I was pleasantly surprised with the quality and functionality.

14 3/16”

by -

Excellent value scope. Love the reticle. Hard to complain at $300 and I’m sure it’ll go on sale at some point too. For those curious, and because it’s not listed on any of the equivalent scopes, this optic is 14 3/16” long.

LE Scoped Rifle SPR T&E


With any state or local entity, budget and fiscal obligations come before anything else. This was tested during a course was at an elevation of 5,100' with typical Colorado weather patterns of 60F sunny days/10F cold days with snow/wind. This course included a lot of running, bouncing, roughing around of the rifle and optic. Almost 1,000 rounds through (currently) it in such a flux of harsh conditions to include snow and mud build up. I did not care for the red dot illumination feature too much as I found that most of the dim light work we could do without it. I ran 55gr, 69gr, and 77gr 556 ammunition through it at various parts of the training. I personally would have liked the mil-reticle to feature more of the traditional "bumps/circles" on the horizontal and vertical stadia but that did not take away from the product overall.


by -

At this price it should have SIX Stars! This is a great scope. At first I thought the reticle was a bit 'crowded' but after a session at the range zeroing it, I was impressed on the simplicity of the Christmas Tree.

Another affordable great optic from PA!