4 Best ACOG Alternative Sights [Updated 2023]

Trijicon ACOG is a field grade prism sight. It's in the $800 - $1300 price range, and here are 4 best ACOG alternative sights to check out.

These optics have great glass clarity for shooters with astigmatism. They feature practical reticle design for ranging target distance and fast acquisition.

Let's check them out

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Primary Arms SLX 3X Prism - Best Compact Size

primary arms slx 3x micro

Why Use A Prism Scope? This new PA 3X prism optic is much shorter and compact. It's like a ACOG 3X scope but cheaper and shorter. 

Glass Etched Reticle Clarity - It features the awesome ACSS Raptor reticle shooters love. Calibrated for 5.56mm, 308 or 9mm

No Battery Required - Reticle stays on without battery

AutoLive - Motion sensor activates reticle illumination under low light if needed

NV Compatible - This optic has 3 different NV-compatible settings

  • Magnification: 3X
  • Objective Lens: 24mm
  • Reticle Type: ACSS Raptor
  • Eye Relief: 2.7"
  • Turret : 0.25 / click
  • Weight: 9.95 oz
New! Vortex Spitfire HD Gen II 5x Prism Scope SPR-500 Color: Black, Finish: Low-Glare Matte, 31% Off  w/ Free Shipping

Why Buy the New Spitfire Gen 2? - The Spitfire Gen 2 5X is a much lighter and ~30% more compact 3X prism scope than others on the market with a similar body profile to something like the Trijicon MRO.

650 Yards Enabled - Shoot up to 650 yards with holdover points at 5X magnification using illuminated AR-BDC4 reticle with 5.56 calibrated wind dot.

Bigger Eye Box - Get behind the sight fast with a lot of room to shift the eye inside the eye box without seeing tight scope shadow

Piggyback Red Dot - Add a 1X red dot on top of the scope to transition from magnified view to 1X. Only available for the 5X model.

Uses Aimpoint Micro Footprint - Just like the Primary Arms Slx 1X


  • Magnification: 5X
  • Objective Lens: 25mm
  • Eye Relief: 2.7"
  • Reticle Type: AR BDC 4
  • Turret : 1 MOA / Click
  • Length: 3.6 inches
  • Weight: 10.3 oz

Trijicon ACOG 3.5X - Best Durability

Trijicon ACOG 3.5x35 Dual Ill Riflescope w/Mount, Green Crosshair .308 Reticle

Why Use Trijicon ACOG 3.5X - Even though this guide recommends ACOG alternative, but we have to talk about the ACOG 3.5X model that features a much better eye relief performance than the original 4X model

Improved Eye Relief - The 3.5X model gives more eye relief distance for better cheek position.

Tighter Shot Groups - Same reticle and performance as the 4X ACOG

Various Reticle Options - We recommend the ACSS reticle for fast ranging and target acquisition.

Daylight Reticle Illumination - Fiber optics illuminates the reticle even in low light conditions as long as it's not completely dark.

  • Magnification: 3.5X
  • Objective Lens: 35mm
  • Eye Relief: 2.39"
  • Reticle Type: TA11 BDC
  • Turret : 0.33 MOA / Click
  • Length: 8 inches
  • Weight: 14 oz
Why Try This One - If you want what the U.S. special forces use in real world applications, the dual role (1-4X) ELCAN prism sight must be on the list for CQB and mid range applications.

Built Like A Tank - Raytheon Technology built the ELCAN for the warfighters in the field as tough as their aerospace defense weapon systems to win fights. It survives drop, kick, bump, shear and other physical abuses to retain zero.

Dual Role Missions - Shoot like a red dot on 1X with generous eye box and 4X for Target ID, all in one package

1-4X Instantly -  Skip 2X and 3X that shooters don't need anyway. Just flip the magnification between 1X and 4X prism scopes like a switch.

BDC Reticle - Calibrated for the NATO 5.56 up to effective 1000 yards (100 yd zero) with fast ranging scale to estimate target distance without a rangefinder

Clear Glass & Large FOV - On 4X feels like looking at the target on a 50" TV through the scope right in front of the eye.


  • Magnification: 1-4X
  • Objective Lens: 32mm
  • Eye Relief: 2.75"
  • Reticle Type: 5.56 BDC
  • Turret : 0.5/ Click
  • Length: 6.02 inches
  • Weight: 23.2 oz

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