EXPS3-4
OPERATOR’S MANUAL
FOR
EXPS3™
HWS® (HOLOGRAPHIC WEAPON SIGHT)
See inside cover for distribution statement.
L-3 Communications EOTech, Inc. (L-3® EOTech®) Technical Manual ver. B
JANUARY 2011
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 x2176
general.eotech@L-3com.com
• This commodity is controlled under the Export Administration Regulations (EAR), ECCN
0A987, and may not be exported to a Foreign Person, either U.S. or abroad, without a
license or exception from the U.S. Department of Commerce.
WARNING
WEAPON SAFETY: Prior to mounting the HWS® on your weapon, be sure the weapon is
cleared. If you are not sure how to clear your weapon, please see the accompanying
operator’s manual for the weapon platform you are mounting the sight 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 is at a power level within the limit of a Class IIa laser product. The
illuminating beam can become accessible to the 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 unde-
sired operation. Complies with 21 CFR Chapter 1, Subchapter J.
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CAUTION
• Never disassemble the sight’s optical assembly. The optical cavity is purged, nitrogen
filled, and sealed to achieve fog proof performance. Disassembly will void the warranty and
render the sight inoperable.
•When using a Night Vision compatible HWS® in tandem with an NV device, 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 intensi-
fier.
•When a sudden increase in resistance is felt in the elevation or windage adjustment shafts,
the end of the adjustment range has been reached. DO NOT TURN THE ADJUSTMENTS ANY
FARTHER OR SERIOUS DAMAGE MAY OCCUR TO THE SIGHT.
• 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 with the exception of the quick
release lever. If audible sounds are generated when opening/closing lever, add a drop of
lubricant to lever assembly. Do not try to lubricate any other moving part.
• 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 affect
the operation of the sight.
• The EXPS3 HWS® units are designed to mount directly to either a 1”(25.4mm) weaver or
MIL-STD-1913 rail specification.
Page
1.0 INTRODUCTION ..................................................................................................................................1
1.1 General Information ............................................................................................................1
1.2 Key Attributes .......................................................................................................................2
1.3 Equipment Description .....................................................................................................5
1.4 Location and Description of Major Components .................................................... 7
2.0 OPERATING INSTRUCTIONS ...........................................................................................................9
2.1 Description of Components, Controls, and Indicators ..........................................9
2.1.1 Hood ........................................................................................................................ 10
2.1.2 Batteries ................................................................................................................ 10
2.1.3 Replacing Batteries ............................................................................................ 12
2.1.4 Electronic Features ............................................................................................. 13
2.1.5 Night Vision Mode .............................................................................................. 15
2.1.6 Windage and Elevation Adjustments .......................................................... 16
2.2 Preventive Maintenance Checks and Services (PMCS) ........................................ 18
2.3 Troubleshooting ................................................................................................................ 19
2.4 Unit Level Maintenance and Repair ........................................................................... 23
2.5 Installation of Equipment............................................................................................... 25
2.6 Zeroing Procedures .......................................................................................................... 26
3.0 APPENDIX A, COMPONENTS OF END ITEM ............................................................................ 29
3.1 Replacement Items ........................................................................................................... 29
4.0 APPENDIX B, FACTORY CONTACTS ............................................................................................ 30
1.0 INTRODUCTION
1.1General Information
This manual is an overview of the EXPS3 HWS® (Holographic Weapon Sight), and will define
the basic operation, features/benefits, and options of this proprietary optical system. The
HWS® is a state of-the-art optical sighting system, employing holographic sighting technology for small to medium caliber weaponry and launching type platforms. The HWS® utilizes
holographic optics fabrication technology that is used in the production of advanced heads
up display in attack fighter aircraft for targeting, gauge reading, weapon system verification, etc. L-3® EOTech® has miniaturized the sophisticated sighting heads up display system
into a compact and rugged package for use on small arms and other weapon platforms.
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1.2Key Attributes
The EXPS3 HWS® is a lightweight, non-magnifying, optical sight designed for Close Quarter
Battle. It allows very fast target acquisition and engagement at short ranges while providing aiming capability out to 300 meters equal to or better than iron sights.
The major combat advantage of the HWS® 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 focus. Operators can quickly acquire
the target and reticle in the same focal plane for fast and accurate shot placement.
The HWS® 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 pattern is parallax free and the holographic heads up
display window allows an undistorted and unrestricted view of the target.
The EXPS3 is offered with one of the following (3) reticle options (see fig. 1):
• 0- 65 minute ring with vertical and horizontal stadia and a 1 MOA aiming dot.
• 2- 65 minute ring with vertical and horizontal stadia and (2) 1 MOA aiming dots
• 4- 65 minute ring with vertical and horizontal stadia and (4) 1 MOA aiming dots
2
Fig. 1 EXPS3 reticle options
The HWS® 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) without
obscuring the target.
Another advantage of the HWS® is the full field of view which allows the operator better
situational awareness. The HWS® employs a true heads up display (HUD) window that
eliminates blind spots and constricted or tunnel vision associated with scope sights.
Controls are inset into the HWS® housing with no protruding knobs, battery compartments,
or rings obscuring 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 EXPS3 can operate in tandem with Generation I – III+ night vision intensifier tubes.
Operators can see the holographic reticle image with helmet mounted or weapon mount-
ed night vision devices. The HWS® is a passive system and emits no signature from frontal
or from a peripheral aspect. While in the NV mode, the sight is undetectable by opposing
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force night vision equipment. The HWS® can be positioned behind night vision systems
without any “bloom” on the target area.
The primary use of the HWS® is for the M4A1 carbine and CQBR in Close Quarters Battle. The
HWS® is not however, limited to carbines. The HWS® is currently employed on medium
caliber machine guns, grenade launchers and less than lethal projectile launchers. The
sight provides a 1X (no magnification) sight picture and is not designed as a long range
sight system, however, it can be used as effectively as iron sights on targets to 300 meters.
The advantage of the HWS® is that it provides the operator superior shooting performance,
rapid reticle-on-target acquisition, full field of view and accurate shot placement. The
HWS® can be naturally employed by all levels of users, from novice to the most highly
trained operator.
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