EOTech 556 - Manual (Page 5)

obscure the target. Utilizing natural binocular vision is an advantage of this sighting
system, as well as additional threat identification through increased operator situational
awareness and peripheral vision. The reflex sight can be naturally employed by all levels
of users, from novice to the most highly trained operator.
The 557.AR223 HWS can operate with Generation I – IV+ night vision intensifier tubes.
Operators can see the holographic reticle image with helmet mounted or weapon mounted night
vision devices. The optic design is a passive system which emits no signature from a frontal or
peripheral aspect. While in the NV mode, the sight is undetectable by opposing force night vision
equipment. The HWS can be used with night vision systems without any “bloom” on the target
area.
The primary use of the 557.AR223 is for the M4A1 carbine in Close Quarters Battle. The sight
provides a 1X (no magnification) sight picture. However, it can be used as an effective longer
range sight when used with a magnification device.
1.3 Equipment Description
Operation
•
Optics: Transmission holography – 100% parallax free
•
Magnification: 1x Eye Relief: Unlimited Length/Width/Height: 4.9”x1.8”x2.8” Weight: 12.3 oz
•
Temperature: -40 to 150 F
•
Waterproof: Submersible to 33 ft of water depth
•
Sealing: Fog-proof internal optics
• Color/Finish:
Non-reflective black on most exposed surfaces
•
Adjustment (per click): 0.5 MOA (1/2” at 100 yds)
•
Adjustment Range: +/- 40 MOA travel
•
Mount: MIL-STD 1913 mounting 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)
•
Field of View (100 yds): 30 yds (28m) at a 4” eye relief
•
Reticle: 65MOA circle with quadrant ticks and within the circle, a vertical four-dot ballistic aiming
array, each 1 MOA in size – calibrated to the ballistic drop of .223 caliber ammunition
Electrical
•
Brightness Adjustment Range: 110,000: 1 brightest to lowest
•
Night Vision Brightness Range: 1000: 1 with NV switch engaged
•
Power Source: 2 x AA batteries
•
Battery Life: 1,000 continuous hours at nominal setting 12 with lithium batteries, 600 hours with
alkaline batteries
•
Brightness Settings: 30 settings with scrolling feature (10 settings for NV use)
•
Auto Battery Check Indicator: Flashing reticle upon start-up
•
Auto Shut-down: At 8 hrs- programmable to 4 hrs