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

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

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This Primary Arms prism 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 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 the 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 the 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. 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
Reticle ColorRed
Turret FeaturesCapped Turrets, Tool Adjustable
Weight14.9 Oz
  • Primary Arms 2.5x and 4x ACSS Review by MrGunsNGear
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

136 reviews



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Bought one of these to go on a Christmas build for my son to use. Clarity of the reticle and glass is pretty amazing to me. I have a bit of astigmatism so i thought i may have issues but no. Son is going to love this. I did think the reticle was going to bigger for some reason and take up more of the visual real estate but it feels good once you get past that expectation. Also pleased to see it is easy to use with both eyes open. I will be saving for another one to go on one of my favorite guns!

Great quality and price


This 2.5x is perfect, I took it to the range and was great from 25yds to 100yds, I'll be buying another one real soon

Great for the money, it feels worth a lot more than I paid


I bought this scope for like $230 from primary arms when it came out. I sold it for the MD-06 red dot (50k hour bat-life), and had to save up to buy another because I missed it so much. Primary arms has outstanding service, and the product is delivered very quickly.

I shot 0.5 MOA at 100 yards using a 10/30 magazine as a monopod with a del-ton heavy barrel mid-length rifle. This scope is great for the budget, and while it may be a little heavy, it has a durable construction.

The included flip-up covers aren't very good. One of them always pops up on its own. I have not tested this optic on a carry handle, but the included mount does a good job holding zero I believe.

It is surprising how clear the scope is. Very clear.

The battery life isn't the best on the illumination, only use at night on low setting and it will last a while

Bang for ur buck


Love it

2.5 and Great customer service


Great customer service for an exchange...had just ordered another scope when the 2.5 went on sale ...swapped me out with no problems and quick ta boot ! P A has awesome products and the 2.5 is no exception ! Old eyes will love it !

Quality Scope

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Installed the Primary Arms 2.5x prism scope on my new AR-15 build. I was looking for a mid range scope without braking the bank. Followed the instructions on zeroing. I had it zeroed at 50 yards after about 15 rounds. After I had it zeroed I was hitting targets consistently from 25 yards out to 500 yards. The BDC works great. Thanks again Primary Arms!!!!

Worth more than $200


Very good quality. I love the 2.5x...I get on target fast with just enough magniification to bring in the distance targets. I abuse this thing...with no issues.

EOTec VS Primary Arms " what a welocomed surprise"

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I have EOTech on my duty weapon so I figured I would buy a budget optic for my Tavor....Wow was I surprised when I went out to the range...I wish could talk my agency into this Primary arms optic..I dialed it in after 3 shots and at 200 yards it was dead on...great optic well worth the money :)

Great Optic


The 2.5x PA Optic has very clear glass holds zero and a very crisp reticle with illumination on or off. I've shot a few hundred rounds with it so far and its performed flawless. It is as accurate as you can be with a 1MOA Dot and good ammo. Now on to the reasons why I did not give 5 stars. The reticle is not perfectly centered It is noticeably to the left. Its not skewed or crooked its just a tad bit to the left When doing any type of fast firing drills it is almost unnoticeable but when your on sand bags and zeroing it it is noticeable. Nothing to cry about its just not perfect. The last reason is kind of stupid. When your selecting the options for the scope it gives you a selection to add a discounted kill flash. I did this for both the 2.5x scopes I ordered (girlfriends and mine). This is great except the default kill flash size is 5x. Not seeing it in the fine print that it was 5x only I ordered it and the wrong size kill flashed were sent. PA was great with customer service and the replacement was easy (except I had to pay to ship the wrong item back to them) But they did do free shipping back with the correct size kill flash. All said and done BUY THIS OPTIC and you will not be disappointed. I am a returned PA customer and I will return again.

Bought one used


and love it I picked up one of these on a forum in like new condition. It was equipped with covers qr flip mount as well as the kill flash. The reticle doesnt need power so it can be used in daytime without using battery life. The smallest dot i believe is 1 moa and hard to see during daytime. With a weaponlight on my ar and this on i have an impressive nightime target view ! I may get a few more of thesethey are a nice alternative to a micro dot style of optic.Built like a tank