EOTech 556 - Manual (Page 7)

Elevation Adjustment - Adjusts the point of impact 1/2 MOA per click vertically
Lock Knob – When tightened, locks the sight to the weapon mount
On/Off, NV Mode, and Brightness Switches - Raised buttons to adjust user settings
2.0 OPERATING INSTRUCTIONS
This section describes the features and operating instructions of the 557.A223. Please read the instructions
carefully before mounting and using the sight, and always practice proper firearm safety.
The Reflex Sight will include:
. • Sight assembly
. • 2 x AA alkaline batteries
. • This Operators Manual
2.1 Description of Components, Controls, and Indicators
The 557.AR223 uses a laser to illuminate a holographic reticle pattern embedded in the heads-up display
window and forms a virtual image of a reticle pattern. The shooter looks through the heads-up display
window and sees a bright red image of a reticle pattern projected onto the target plane. There is no light
projected onto the target plane. The Reflex Sight has no magnification.
2.1.1 Hood
The 557.AR223 is equipped with a protective hood, pre-assembled at the factory. Should the hood require
repair or replacement, please contact the unit armorer or return the sight to the manufacturer (L-3 EOTech)
for repair or replacement.
2.1.2 Batteries
Two (2) commonly available Type AA 1.5 volt alkaline batteries power the 557.AR223. Two batteries are
supplied with the sight. The sight will maintain constant brightness when set to a particular setting as long as
the batteries have useful life remaining. The reticle brightness will not fade gradually as the batteries run
down. The sight will, however, shut down abruptly. The first indication of the batteries draining is the reticle
blinking when the unit is turned on (see Electronic Features 2.1.4). Another indication of low battery life is
the reticle pattern blinking off and on during recoil. With high recoil guns, this can occur before the battery
check indicates low battery condition. If the reticle pattern blinks off and on during recoil or turns off
suddenly, replace the batteries. Please read and follow the battery replacement and battery check
procedures described in this Manual. Alkaline batteries from different manufacturers are not all constructed
the same way. Tests show some brands are more susceptible to degradation by the shock of recoil. We
recommend the use of Eveready Energizer™ batteries. It is always good practice to replace the batteries
with a fresh set before a mission.
2.1.3 Replacing Batteries
Remove the battery compartment by lifting the battery cap latch which, which rotates a locking cam.
Carefully slide the battery compartment away and up from the sight housing (Figure 4). After the battery
compartment is removed, remove the batteries and replace them with a fresh set. The labels on the bottom
of battery compartment show the correct battery orientation. Always make sure the seal is free of dirt before
the battery compartment is reinstalled or the water-proofing may be compromised. To reinstall the battery
compartment, reverse the steps to remove the compartment, holding the battery compartment down firmly
against the base when closing the locking cam. Before pushing down on the battery cap latch, make
sure the battery compartment is fully seated and is parallel to the base. Verify correct battery
installation immediately by turning on the sight and checking if the holographic reticle appears. If the
batteries are left in the sight backwards, they will be drained of power.