Primary Arms SLx 2.5 Compact 2.5x32 Prism Scope - ACSS-CQB-M1

Manufactured by Primary Arms
MPN: 710003
Manufactured by Primary Arms
89 Reviews

In Stock

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This rifle scope is part of our SLx optics line. SLx optics built our 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 2.5X Compact Prism Scope with ACSS CQB-M1 reticle is the lightweight, do-everything scope you've been looking for. The low 2.5X magnification and bright illuminated reticle allow for fast, both-eyes-open shooting at close range, while the ACSS CQB-M1 reticle allows for easy hits on targets out to an impressive 600 yards. Whether you're looking for a new scope for competition, hunting, or plinking, why look any further?

  • ACSS 5.56 CQB-M1 reticle has BDC and ranging out to 600 yards with 5.56 NATO, .223 Remington, 5.45x39mm, and .308 Winchester
  • Fully illuminated reticle is visible even in bright daylight
  • Optional M1913 Picatinny top rail for piggy-backed red dot sights
  • Generous 10.16mm exit pupil allows for a bright sight picture and forgiving eye box
  • 37.5ft field of view at 100 yards provides easier tracking of mobile targets
  • 2.7" of eye relief
  • 1/2 MOA turret clicks are tactile and audible for easy zeroing
  • Tough prism scope is waterproof, fog resistant, and shockproof
  • Durable Type II hardcoat anodized black finish
  • Compatible with standard AR15 carry handle mounts
  • Protected by a lifetime warranty

The heart of our tough 2.5X Prism Scope is the ACSS 5.56 CQB-M1 reticle that combines ranging, wind leads, moving target leads, and ballistic drop compensation out to 600 yards. The outer horseshoe of the glass etched reticle is used for close quarters engagement, simply place the generous semi-circle on the target and run with it! Each side of the horseshoe also has our integrated ranging system. Place the bottom of the target on the bottom rung and range up. If you know your targets are roughly 18 inches wide, they can be ranged on the side Auto Range system, or directly on the BDC hold overs! Two dots on either side of the inner horseshoe offer a moving target lead moving with an average speed of 8.6 MPH. Each step of the BDC system includes a 5 MPH wind hold, drastically improving first hit probability at any range. As an added bonus, the glass etched reticle does not require batteries or illumination, but 11 brightness settings (including daylight bright) allow for fast acquisition in close quarters, or enhanced visibility in fading light, powered by a common CR2032 battery!

The PAC2.5X offers mounting flexibility to suit your needs. The included 1913 MIL-STD Picatinny thumbscrew mount can be removed and replaced with any mount that accepts AR-15 carry handle-type optics, or simply so you can mount the 2.5x Prism Scope directly to an AR-15 style carry handle. Optionally, shooters can add an M1913 picatinny rail to the top of the optic to piggyback a red dot back up sight. The PAC2.5X offers the perfect amount of magnification to balance close quarters speed with hits at medium range, in a flexible and durable package.
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Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Click Value1/2 MOA
Eye Relief2.70 in
Field View 10037.50 ft
Focal PlanePrism Scope
Manufacturer.Primary Arms
Optic SeriesSLx
ReticleACSS CQB M1
Turret FeaturesCapped Turrets, Tool Adjustable
Weight14.9 Oz
  • Primary Arms 2.5x and 4x ACSS Review by MrGunsNGear

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

89 reviews

  • 3 stars
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  • 1 star
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Best scope for the money


Really good optic, very clear sight image. Has a good mounting base too. definitely can't beat it at the price point

Check the mounting screws on the base. Other wise Great.

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I just finished a rifle class at my local range. The optic did better than expected. It was easy to pick up and engaged targets. It is a vast improvement over the Sig Sauer Romeo I used to use on my Kel Tec RDB.
<br>However, like most of the people giving it four stars, the mounting screws on the base came loose. The day before the class I finally had time to zero the scope. The wobble made the task more difficult than planed. The range armorer had to help me get the screws tight enough to finish zeroing. Once home, a bit o f blue locktite and the problem was solved.

Best optic I've ever used


Bought one of these in 2017, been using it on an AR platform ever since. Clear glass and reticle, very durable optic. Used in 3 gun shoots and advanced move and shoot ranges. Same issue as discussed, use some loctite on the mounting screw threads. Best optic I've ever used. Works well out to 550 meters (601 yards), farthest I've fired. Right on target 27/30 rounds.

Get One You Will Not Be Disappointed


Picked one of these up a few months ago to put on a Freedom Ordanance FX-9 8" PCC. I am at a loss for words at the value of this scope. The FX-9 was already a great short to medium range it is a tack driver. The lighted reticle is awesome at dusk and even visible in full sun with 11 brightness settings. A wonderful scope for the money and it takes a beating and keeps on ticking. Use blue loctite on the screws that hold the scope to the mount before you install it on the weapon of your choice and it will never let you down. Primary Arms has a real winner here!!!!!

Compatible quick detach mount


What quick detach mount fits this optic? I want to replace the base that comes with it with a quick detach.

A steal...


Paying just $200 for this optic is like stealing. Seriously. It's the best $200 you'll spend on a rifle accessory. Glass is clear as a bell. Reticle is really easy to use. I just can't say enough good things about it.

Great optic


I love this optic. 2.5x makes for good close range optic and medium range engagements. when I had it on my 14.5 in ar 15, I was able to use the bdc accurately out to 600 yards. Now this is on my 18in 6.5 creedmore, I have to find a zero that will line up with the bdc.



This thing has been on my rifle for over a year. Two different uppers and sighting in is easy. And, unlike several other brands (looking at Poortex) has survived bouncing around in different vehicles AND a 60 MPH to zero crash. I gotta smoke some Texas hogs for that wreck...
<br>All in all, it's better than others...(Poortex).

2.5x ACSS

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Really enjoy using this optic. The glass has nice clarity and the etched reticle is super crisp. Definitely worth the money.

The BEST budget priced optic I have seen


Easily the best option you have on the market for 'fighting rifle' optics, unless you have $1k+ to drop on glass. I have an M4 clone with the fixed carry handle, and the ability to mount these directly to the handle in a very low position, and still use the iron sights, is a welcome addition to the features.