Here are the 6 best Ruger AR 556 scopes including red dot sights.

Most optics will work on the Ruger AR just like other ARs, and these ones are what we have picked out:

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Holosun 510C - Best Overall

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Why people love this red dot sight - HoloSun makes some of the most popular optics for handguns, rifles and shotguns. This is a great Ruger AR 556 red dot sight at an reasonable price point.

Works For Astigmatism - Parallax-free holographic sight with unlimited eye relief + adjustable reticle brightness to help shooters with bad astigmatism to see more clearly

Versatile Reticle System - Cycle through simple point and shoot dot or with a 65 MOA holdover for distance shooting. Zero at 36 yard for a 5" effective shot group

Solar Fail Safe - Solar panel extends the battery life longer to keep you in the fight longer even when the battery dies, and it also acts like a fiber optic that turn light exposure into battery power

Quick Detach - Mount and de-mount the optic without any tools in the event of optic failure or swapping optic on the go.

At this price point, which is the lowest it’s ever been for a reflex sight like this one, You’ll save a ton of money. Just make sure to click the button below for the best deal.

  • Magnification: 1X
  • Objective Lens: 32 X 23 mm
  • Eye Relief: Unlimited
  • Reticle Type: 65 MOA Ring + 2 MOA Center Dot
  • Battery: CR123A
  • Turret : 0.5 MOA / Click
  • Length: 3.3 inches
  • Weight: 4.94 oz

See HS510C Review Here

EOTech EXPS3 HWS - Best CQB Holographic Sight

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Why Use The EOTech? This is a operator grade sight that Over millions of units are sold to military and law enforcement around the globe. Combat proven, good aesthetics and great CQB aiming performance.

Shoot With Both Eyes Open - Widen your situational awareness and get on target fast and not miss anything in the corner of your eye

Unobstructed FOV - 30 X 23 mm large window let's the shooter easily acquire the target while shooting on the move, shooting over barricade and around corners.

Night Vision Capable - Shoot in the dark with night vision goggles using the NV mode. Not many sights out there have this feature.

Fast Ranging BDC Reticle - Range a 5'8" tall human size target inside the 68 MOA reticle to quickly estimate relative target distance. In addition, use a magnifier behind the EXPS3 -4 to Engage up to 600 yards

CQB Holdover - Use the bottom of the 68 MOA ring for fast close range holdover to compensate CQB sight over bore offset.

Raised Height - No need to purchase additional riser mount. The sight sits at 1/3rd co-witness height for better cheek position for most shooters and clears over any iron sights.

  • Magnification: 1X
  • Objective Lens: 30 X 23 mm
  • Eye Relief: Unlimited
  • Reticle Type: 68 MOA Ring + 2 MOA Center Dot
  • Battery: CR123A
  • Turret : 0.5 MOA / Click
  • Length: 3.88 inches
  • Weight: 11.2 oz

Check out more EOTECH EXPS3 Pics & Review Here

Holosun 515GM - Lowest Profile

Holosun Military Grade Micro HS515GM , Color: Black, Battery Type: CR2032, 15% Off w/ Free Shipping

The Holosun 515GM is the closest thing to an expensive Aimpoint Micro. It checked all the boxes for being a durable mil-spec red dot sight, and for the price point it's the best Aimpoint Micro alternative.

Point & Shoot - Shoot CQB targets fast even in improvised shooting positions without scope shadow or complete eye alignment required

See Through Flip Covers - It protects the optic from dust, and no need to flip up the lens covers before engaging

Motion Activated Reticle - ShakeAwake technology activates the reticle upon sensing any movement, and it turns off to save battery when sitting at rest

Mulit-Reticle - Just like the HS510C, cycle through different reticles for your specific need

Uses Aimpoint Micro Mount - Uses any aftermarket Aimpoint Micro mounts you like with various height options

  • Magnification: 1X
  • Objective Lens: 20mm
  • Eye Relief: Unlimited
  • Reticle Type: 2 MOA + 65 MOA ring
  • Battery: CR2032
  • Turret : 0.5 MOA / Click
  • Length: 2.44 inches
  • Weight: 3.74 oz
Vortex spitfire ar 1x prism unboxing

Why Use A Prism Scope? This is by far the best for shooters with astigmatism, open division shooting competition, and use as a truck rifle setup. The user doesn't have to worry about the battery or reticle disappearing for the Ruger AR 556.

Works For Astigmatism - See reticle clearly with good light transmission. No blurry reticle for precise aiming with amazing accuracy

Better Reticle Centering -  Eye box constraint forces the shooter to have consistent cheek position for precise long-distance shots up to 700 yards on 1X by reducing parallax offset

Works Without Battery  - The laser glass etched reticle is always there without battery power during daylight use. 

vortex spitfire prism sight reticle indoor

Illuminated DRT Reticle - See reticle in low light conditions and acquires the DRT circular reticle like a red dot fast

  • Magnification: 1X
  • Objective Lens: 25mm
  • Eye Relief: 3.8"
  • Reticle Type: DRT MOA
  • Battery: AAA
  • Turret : 0.5 MOA / Click
  • Length: 4.3 inches
  • Weight: 11.2 oz
  • Primary Arms 1-6X SLX ACSS Raptor - Best For Distance Shooting

    ar15 with primary arms slx 1-6x acss

    Why Use This Scope? - This is one of the best mid range capable rifle scope for rapid target acquisition with combat proven reticle aiming system.

    Affordable 1-6X - Primary Arms makes some of the most affordable 1-6X option for anyone starting new or experienced.

    Crisp Image - See long range target clearly even under dusk and dawn lighting condition


    ACSS Raptor Reticle - Calibrated 5.56 BDC reticle with vertical auto ranging scale to quickly estimate known target size distance & moving target holdover to hit targets with excellent accuracy.

    Capped Tactical Turret - Once zeroed the elevation and windage turrets are protected from unexpected adjustments. To adjust - remove caps and dial turrets without any tool.

    • Magnification: 1-6X
    • Objective Lens: 24mm
    • Focal Plane: Second Focal Plane
    • Tube Size: 30mm
    • Reticle Type: ACSS Raptor
    • Turret : 0.5 / click
    • Length: 10.0 inches
    • Weight: 16.9 oz

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    The Vortex Micro 3X can turn your 1X power red dot or holographic sight into a 3X mid-range optic without any mod. Works with all types of reflex sights on the market.

    Fast Sight Transition - Go between 1X and 3X in no time! Just flip the 3X magnifier right in front of the red dot for a better long-distance target ID and aim.

    Better Zero - Zero your 1 or 2 MOA size red dot reticle to a greater degree precision +/- 0.2 MOA on 3X than 1X. Works even better with Chevron tip reticle as fine as your eyes can see

    Quick Detach - Keep the same red dot setup, and just remove the magnifier off the top receiver via the QD lever mount to save weight at any time

    Read Detailed Micro 3X Review

    Why Use EOTECH 5X? - Just like the Vortex Micro 3X. Now 5X magnification for targets sitting further away for better target ID at long distances with precise holdover aim.

    Compact Size - Slightly longer than the Vortex Micro 3X and the original EOTECH G33, but 5X!