556
OPERATOR’S MANUAL FOR
HWS 557.AR223 REFLEX SIGHT, HOLOGRAPHIC, NV
COMPATIBLE, AA, L-3 EOTECH ORDER CODE: 557.AR223
See inside cover for distribution statement.
L-3 Eotech Technical Manual ver. 1.0
APRIL 2007
DISTRIBUTION STATEMENT: Distribution is authorized to U.S. Government agencies and their
contractors. This publication is required for administration and operational purposes. Additional
copies of this document can be found on the manufacturer’s website. Written requests must be
referred to:
L-3 EOTech Service Dept. Attn: TM Request 1201 E.Ellsworth Rd. Ann Arbor, MI 48108
(734)741-8868 x3688 general@eotech-inc.com
DESTRUCTION NOTICE:
and then crushing the battery cap. Destroy this document by any method that will prevent
disclosure of contents or reconstruction of the document.
Destroy the sight’s operability by removing the battery cap, batteries,
WARNING
WEAPON SAFETY: Prior to mounting the Holographic Weapon Sight (HWS) on a weapon, be
sure the weapon is cleared. If you are not sure how to clear the weapon, please see the
operator’s manual for the weapon platform you are mounting the HWS on.
LASER SAFETY: The HWS is a Class II laser product. The Class II level illuminating beam,
however, is completely blocked by the housing. The only laser light accessible to the eye is the
image beam and produces a power level that is within the limit of a Class IIa laser product. The
illuminating beam can be viewed directly by eye if the housing is broken. Turn the sight off
immediately and return the broken unit to the factory for repair.
FCC COMPLIANCE: The HWS complies with Part 15 of the FCC Rules. Operation is subject to
the following conditions: (1) this device may not cause harmful interference and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CAUTION
• Never remove any screws or disassemble the sight’s optical housing components. The
optical cavity is nitrogen filled and sealed to prevent internal fogging.
• Disassembly will void the warranty and render the sight inoperable.
• Always check to make sure the sight is off before pressing the NV button to turn on the
sight in the Night Vision mode. Otherwise, it will toggle to the Normal mode and saturate the
image intensifier.
• When a sudden increase in resistance is felt in the elevation or windage adjust ment
shafts, the end of the adjustment range has been reached. DO NOT TURN THE ADJUSTMENTS
ANY FARTHER OR SERIOUS DAMAGE TO THE SIGHT MAY OCCUR.
• Never clean the glass surface with a dry cloth or paper towel; always dampen the glass
surfaces prior to cleaning
• All moving parts of the sight are permanently lubricated. Do not try to lubricate them.
• Do not use deteriorated or corroded batteries. Inspect batteries for rips, tears, dents, or
cuts in the housing. If there is any exposed internal content of the battery, it could negatively
effect the operation of the sight.
TABLE OF CONTENTS
Page
1.0 INTRODUCTION
1.1 General Information
1.2 Key Attributes
1.3 Equipment Description
1.4 Location and Description of Major Components
2.0 OPERATING INSTRUCTIONS
2.1 Description of Components, Controls, and Indicators
2.1.1 Hood
2.1.2 Batteries
2.1.3 Replacing Batteries
2.1.4 Electronic Features
2.1.5 Night Vision Mode
2.1.6 Windage and Elevation Adjustments
2.1.7 MPO (Multi-Purpose Optic) Shroud
2.2 Preventive Maintenance Checks and Services (PMCS)
2.3 Troubleshooting
2.4 Unit Level Maintenance and Repair
2.5 Installation of Equipment
2.6 Zeroing Procedures
3.0 APPENDIX A, COMPONENTS OF END ITEM
4.1 Basic Issue Items
4.2 Replacement Items
4.0 APPENDIX B, FACTORY CONTACTS
1.0 INTRODUCTION
1.1 General Information
This manual describes the basic operation, features, benefits, and use of the L-3 Eotech
557.AR223 Holographic Weapon Sight. The sight utilizes a proprietary optical system which
employs holographic sighting technology for small to medium caliber weaponry and launching
type platforms. The sight incorporates holographic optics technology such as that used to
produce advanced heads-up displays in attack fighter aircraft for targeting, gauge reading,
weapon system verification, etc. L-3 EOTech has miniaturized a similar heads-up display system
into a compact and rugged package for use on small arms and other weapon platforms. The
sight type is commonly referred to as a reflex sight.
1.2 Key Attributes
• The 557.AR223 reflex sight is a lightweight, non-magnifying, optical sight designed for
Close Quarter Battle. It allows very fast target acquisition and engagement at short range
while providing aiming capability out to 300 meters equal to or better than iron sights.
The sight can, however, be used in conjunction with an L-3 Eotech Optical Magnifier.
When an Optical Magnifier is used, the effective range is extended to 600 meters. By
utilizing the aim point indicators of the AR223 Ballistic Reticle (Figure 1), high accuracy
placement of rounds can be achieved.
Figure 2: AR223 Ballistic Reticle
• The major combat advantage of the reflex sight is extremely rapid reticle-on-target
acquisition. As quickly as a target is identified, the holographic reticle can be
superimposed on the target. The sight allows operators to maintain eye contact on the
target and to place the holographic reticle onto the target without shifting eye focus.
• An Operator can quickly acquire the target and reticle in the same focal plane for fast and
accurate shot placement.
• The 557.AR223 appears to project the holographic image of a reticle on the target plane.
The sight can be used as a bright open reticle image or a fine dot which is limited only by
the acuity of the shooter’s eye. The reticle is parallax free and the holographic heads-up
display window allows an undistorted and unrestricted view of the target.
• The 557.AR223 offers extremely fast target acquisition in Close Quarter Battle (CQB)
using the large ring, and aiming precision in longer range engagements (using the MOA
Dot array) without obscuring the target.
• An advantage of the 557.AR223 is the full field of view which allows the operator better
situational awareness. The sight’s true heads-up display window eliminates blind spots
and constricted or tunnel vision associated with scope sights. Controls are inset into the
Reflex Sight housing with no protruding knobs, battery compartments, or rings that would
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” W eight: 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
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