EOTech 556 Holosight

The Model 556 is destined to become the most popular HWS in use. It is a deviation from the Model 557 and offers the battle tested 65 MOA. circle/ 1 MOA. dot reticle. Its side button operation offers quick brightness adjustments and it is powered by the ever popular Lithium batteries. The mounting base has been designed to clear the delta ring space needed for mounting. Utilizing only 3.2 inches of rail space, the Model 556 requires less rail than the small N cell Battery HWS units. This is ideal for use with magnification or night vision and preserves adequate rail space for a rear back up iron sight.

Buttons on left side of sight (not in back) to work specifically with NV or magnifiers
Night Vision Compatible
Require 2 x CR123 Lithium batteries
Battery Life is about 1100 continuous hours at nominal setting 12
There are 30 brightness settings with scrolling feature (10 brightness settings for Night Vision use)
Auto Battery Check Indicator: Flashing reticle upon start-up
Two options of auto shut-down, either HOLO Sight can shut down at 8 hrs or after 4 hrs
Powered by two 123 Lithium batteries, allowing cross application with other electronic gear.
7mm (1/4") raised base to provide an operator a consistent cheek weld with all other standardized optics.
66 (2ATM) feet water submergibility.
Battery cap tether to avoid loss in the field.

Specifications
Optics	Transmission holography - 100% parallax
Magnification	1x unlimited eye relief
Length/Width/Height	4.9 x 1.8 x 2.8
Weight (oz)	12.3
Temperature	-20 to 150F (operating); -40 to 160F (storage)
Sealing	Waterproof (submersible) to 66 ft & Fogproof
Color/Finish	Flat non-reflective black on some small components
Adjustment (per click)	0.5 MOA (1/2" at 100 yds)
Adjustment Range	+/- 40 MOA travel
Mount	1” Picatinny (MIL-STD-1913) rail
Return to Zero	Repeatable to 1 MOA after remounting
Heads-Up Display Window
Optics Surfaces	Anti-glare coating
Window Dimensions	1.20" x 0.85" (30 x 23 mm)
Window Material	Shatterproof laminate (3/16" thick)
Field of View @ 100 yards	30 yards (28m) at a 4" eye relief
Standard reticle	65 MOA ring with quadrant ticks with a 1 MOA Aiming dot
Reticle Contrast Ratio:	28,000:1 brightest to lowest
Night Vision Contrast Ratio:	10,000,000:1 with NV switch engaged
Electrical
Power Source:	2 x "CR123" batteries
Battery Life:	1100 continuous hours at nominal setting 12
Brightness Settings:	30 settings with scrolling feature (10 settings for NV use)
Auto Battery Check Indicator:	Flashing reticle upon startup if batteries are at 20% of battery life
Auto Shutdown	At 8 hours - programmable to 4 hours

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EOTech 556 Holosight

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