EOTech 557 AR223 Holographic Weapon Sight (HWS) Night Vision Compatible (M557):

EOTech 557 AR223


EOTech 557 AR223 Specifications

The new 557.AR223 has been developed to optimize the functionality of the HWS. The buttons have been moved from the back to the left side for instant access, allowing a magnifier, night vision, or a back up iron sight to fit closely to the HWS body. This new button position allows the user to operate the HWS function switches easier than ever before. Additionally, a portion of the front base has been raised to allow the sight to fit over standard hand guards found on many M-4 or M-16 style weapons.

The 557.AR223 is configured with a new ballistic matching reticule image for the M4 carbine. The battle tested circle/dot reticule will be offered along with a series of 1 MOA aiming dots that are vertically aligned and calibrated specifically for the ballistic drop of .223 caliber ammunition. The reticule provides 4 aiming dots for target distances of 0-300m, 400m, 500m, and 600m.

  • Buttons on left side to work specifically with NV or magnifiers
  • AA Battery model (supports Lithium or Alkaline)
  • Ballistic reticule specific to .223 caliber munitions
  • Compatible with Gen I-III+ Night Vision Systems (tandem operation)
  • Raised 7mm base


  • Optics: Transmission holography -  parallax free
  • Magnification: 1x
  • Eye Relief: Unlimited
  • Length/Width/Height: 5.70"x2.1"x2.8" (133x49x71 mm)
  • Weight: TBD
  • Temperature: -40 to 150 F (using AA lithium); -20 to 140 F (AA Alkaline)
  • Waterproof: Submersible to 33 ft depth
  • Sealing: Fog proof internal optics
  • Color/Finish: Non reflective black with hard coat finish
  • Adjustment (per click): 0.5 MOA (1/2" at 100 yd's)
  • Adjustment Range: +/- 40 MOA travel
  • Mount: 1" Picatinny (MIL-STD-1913) rail
  • Return to Zero: Repeatable to 1 MOA after re-mounting

Heads-Up-Display Window

  • Optical Surfaces: Anti-glare coating
  • Window Dimensions: 1.20" x 0.85" (30 x 23mm)
  • Front Window Material: 1/8" solid glass
  • Rear Window Material: Shatter resistant laminate (3/16" thick)
  • Field of View (100 yd's): 30 yd's (28m) at a 4" eye relief
  • Standard Reticule: AR223 BDC reticule with additional drop point dots for 400, 500, and 600 meters


  • Brightness Adjustment Range: 146000:1 brightest to lowest
  • Night Vision Brightness Range: 1280:1 with NV switch engaged
  • Function Button Location: Left side near the rear of sight
  • Power Source: 2x 1.5V AA batteries (supports lithium, alkaline, or rechargeable)
  • Battery Life: 1,000 continuous hours (lithium) at nominal setting 12; 600 continuous with AA alkaline
  • Brightness Settings: 30 settings with scrolling feature (10 settings for NV use)
  • Auto Battery Check Indicator: Flashing reticule upon start-up
  • Auto Shut-down: At 8 hrs- programmable to 4 hrs

EOTech 557 AR223 Reticule

The most two most important things to remember when using the EOTech HWS optics are as follows:

EOTech 557 AR223 Reticle

  • Focus on the target and not the reticule - Failure to do so will make you think that the optic is defective when in fact its not.
  • Use the lowest setting possible to keep the reticule from blooming and becoming unusable

Below are random images of the EOTech 557 AR223's reticule in various states of focus and brightness. Click the images to view them full size.

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EOTech 557 AR223

EOTech 557 AR223 Information, Articles and Reviews

EOTech 557 AR223 Images

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EOTech 557 AR223

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