Operator`s Manual
OPM 009 REV A
Operator’s Manual
SpecterOS 4x by ELCAN
Lightweight Day Sight
4x Single Field-of-View Optical Sight
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OPM 009 REV A
Copyright © 2011 Raytheon ELCAN Optical Technologies
TABLE OF CONTENTS
CHAPTER 1 GENERAL DESCRIPTION & SPECIFICATIONS
1.1 Description
1
1.2 Technical Specifications (nominal)
4
1.3 Controls and Terminology
6
1.4 Safety
11
CHAPTER 2 PREPARATION FOR USE & INSTALLATION
2.1 Mounting Sight to the Weapon/Eye Relief
12
2.2 Zeroing
14
CHAPTER 3 PRINCIPLES OF OPERATION
3.1 Reticle and Ranging
25
3.2 Reticle Illumination
26
CHAPTER 4 MAINTENANCE
4.1 Preventative Maintenance
28
4.2 Changing the Battery
29
4.3 Cleaning
30
4.4 Replacement Parts
31
4.5 Preparation for Shipment
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TABLE OF FIGURES and TABLES
CHAPTER 1 GENERAL DESCRIPTION & SPECIFICATIONS
Figure 1-1: Eye Relief
Figure 1-2: Overall Views
Table 1-1: Technical Specifications (nominal)
Figure 1-3: Left Side View and Selected Controls
Figure 1-4: Right Side View and Selected Controls
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3
4
6
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CHAPTER 2 PREPARATION FOR USE & INSTALLATION
Figure 2-1: Lever lock sight to MIL-STD 1913 rail
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Figure 2-2: Proper Eye Relief
13
Figure 2-3: Azimuth/Windage Adjusts
17
Figure 2-4: Aimed fire shot group
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Figure 2-5: Determine approximate center of group
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Figure 2-6: Adjust Azimuth/Windage or Elevation
20
Figure 2-7: Adjust POI - Azimuth/Windage
21
Figure 2-8: Adjust POI - Elevation
23
Table 2-1: POI Movement per Click of Adjustment
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CHAPTER 3 PRINCIPLES OF OPERATION
Figure 3-1: Reticle (not to scale)
Figure 3-2: Sample Illustration of Reticle Detail (not to scale)
Figure 3-3: Red Dot and Illumination Ballistic Reticle
Figure 3-4: Reticle Illumination Switch Operation
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CHAPTER 4 MAINTENANCE
Figure 4.1 Battery Replacement
Table 4-1: Replacement Parts
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OPM 009 REV A
Copyright © 2011 Raytheon ELCAN Optical Technologies
CHAPTER 1: GENERAL DESCRIPTION & SPECIFICATIONS
WARNING: Clear and safe the weapon prior to mounting the sight!
1.1 Description
The SpecterOS 4x Optical Sight provides the shooter with a 4x-magnified sight with a fieldof-view of 6°. This magnification allows for long-range target identification and precision
marksmanship capability out to 600 meters range by using the bullet drop compensation
reticle (graticule).
A red LED is used to illuminate the reticle. When turned in the counter-clockwise direction, the
reticle illumination switch provides five illumination levels of a “red dot” aiming mark. The red
dot attracts the eye to the precise point of aim and bullet impact. By rotating the switch in the
clockwise direction, five levels of illumination for the whole reticle allows dawn to dusk and
night shooting of the sight
‘Throw Levers’ attach the sight to the MIL-STD 1913 rail. This lever system provides accurate
zero retention when the sight is repeatedly removed and replaced on the rail.
The sight can be fitted with an accessory mount that fits on top of the housing to accommodate
a ’mini red dot sight’. An anti-reflection device (ARD) and a laser protection filter are also
available as options.
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1.1 Description (continued)
2 ¾”
70mm
Figure 1-1: Long eye relief
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1.1 Description (continued)
Top View
Front View
Rear View
Left Side View
Figure 1-2: Selected Overall Views
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1.2 Technical Specifications (nominal)
Specification
Fixed Magnification
4x (nominal)
Field of View
Min 6°
32 mm (1.3”)
Objective Lens Dia.
Exit Pupil
Min 7.7mm (0.3”)
Eye Relief
70mm (2 ¾”)
Optical Axis Height
39mm (1.53”)
±60 MOA
Zeroing Range
MIL-STD 1913
Mount Compatibility
Length, Width, Height (from rail)
Aiming Point
153.1mm x 73mm x 69mm
(6.0” x 2.9” x 2.7”)
1.5 MOA Dot
Table 1-1: Technical Specifications (nominal)
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1.2 Technical Specifications (nominal - continued)
Specification
Reticle Pattern
Illumination
5.56, 7.62 STD
LED (650nm)
Operating Temp
-40 to +65 °C
(-40 to 140 °F)
Storage Temp
-40 to +71 °C
(-40 to 160 °F)
Submersion
2 hours @ 20 m (66 FSW)
Battery / Life
DL 1/3 N
Min 300 hrs @ max brightness
Finish
Mount Attach
Weight
Anodized
Dual Levers
528 g (18.6 oz)
Table 1-1: Technical Specifications (nominal - continued)
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1.3 SpecterOS 4x Controls and Terminology
MRD Mount Optional
Front
Rear
Reticle Illumination
Switch
Elevation
Adjustment Dial
Windage/Azimuth
Adjustment Dial
Figure 1-4: Left Side View and Selected Controls
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1.3 SpecterOS 4x Controls and Terminology
ZERO LOCK
ELEVATION
ADJUST
WEAPON MOUNTING LEVERS
Figure 1-4: Right Side View and Selected Controls
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1.3.1 Mount Attachment ’Throw Levers’
The throw levers are used to secure the sight to the weapon’s MIL-STD-1913 “Picatinny”
rail. The SpecterOS 4x uses two low profile locking levers that point to the rear when
attached. Additional tie/wire wrap points are provided as an additional means to lock the
levers in place.
1.3.2 Elevation Dial and Lock
The elevation zero dial is located at the lower rear of the mount, and the zero lock (silver
tab) is just above the dial. When the lock is in the UP position, the dial may be used to
adjust the elevation Point of Impact (POI) ½ Minute of Angle (MOA) per click. If the zero
lock is DOWN, the zero dial is locked in place and the sight elevation is fixed.
Caution:
To prevent damage, be sure that the lock is fully disengaged before
attempting to turn the elevation dial!
1.3.3 Azimuth/Windage Adjustment Screw
The azimuth/windage adjustment screw is located at the front left side of the mount.
Rotating it adjusts the Point of Impact (POI) to the right or left. Each ‘click’ moves the
point of impact ½ MOA (approximately ½” (12.7mm) at 100 yards (91m)).
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1.3.4 Reticle Illumination Switch
Rotating this knob illuminates the reticle at varying levels of brightness. Reference marks
on the housing indicate the operating positions of the switch. The first two settings from
OFF, each way, are night vision equipment compatible.

Counter Clockwise rotation - illuminates the Red Dot with 5 intensity levels.

Clockwise rotation - illuminates the ballistic reticle with 5 intensity levels.
1.3.5 Battery Cap and Lanyard
Located on the Reticle Illumination Switch, the battery cap may be removed by hand by
unscrewing it in the counter clockwise direction. A lanyard attaches it to the sight housing
and prevents loss when changing the battery. A battery cap should only be tightened
until snug.
1.3.6 Mini Red Dot
A Mini Red Dot sight with a matching mounting pattern can be mounted to the optional
MRD Mount on top of the SpecterOS 4x.
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1.3.7 Laser Protection Filter and Anti-Reflection Device (ARD)
An optional Laser protection filter can be attached at the objective or front of the sight by
rotating the filter in a clockwise direction until it is finger tight. It is removed by rotating it
in a counter clockwise direction.
An optional ARD can be mounted on the sight in the same manner as the laser
protection filter and can be fitted without using the filter.
WARNING


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The laser protective filter protects your eyes from being burned by battlefield lasers,
but also greatly diminishes the performance of the optic. When facing enemies
who use battlefield lasers, failure to utilize the laser filter could result in the
loss of your eyesight from enemy laser beams!
The ARD cuts down on reflection from the lens caused by the sun or other sources
of ambient light. Failure to utilize the ARD or take other tactical measures to
hide your lens reflection in bright daylight could reveal your position.
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1.4 Safety
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1.
Ensure the weapon is clear, on safe and pointed in a safe direction while mounting the
sight.
2.
Ensure sight is secured tightly to the weapon prior to conducting live fire.
3.
To avoid injury, ensure that the eye relief has been adjusted to provide a safe distance
between your eye and the rear of the sight.
4.
Proper zeroing techniques must always be taken prior to using the sight.
OPM 009 REV A
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CHAPTER 2: PREPARATION FOR USE & INSTALLATION
2.1 Mounting Sight to the Weapon/Eye Relief
Installing the optical sight onto the weapon involves the following steps:

Loosen the mount throw levers by rotating them out at 90° to the sight and place the
sight on top of the MIL-STD 1913 rail.
ELEVATION ZERO DIAL LOCK
ELEVATION ADJUSTMENT DIAL
WEAPON MOUNTING LEVERS
Figure 2-1: Lever lock sight to MIL-STD 1913 rail
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2.1 Mounting Sight to the Weapon (continued)

‘Cheek’ the weapon in the normal firing position.

Slide the sight along the rail until the correct eye relief is achieved for the user’s
natural head position and a full field of view is visible through the sight. Approximate
eye relief is 70mm (2.75”). The field of view tunnel effect should be minimized when
the eye relief is adjusted properly, producing a circular and sharp image (see Figure
2-2).
2 ¾”
70mm
4
6
8
10
M4 100-600 m
M249 700-1000m
4X ONLY
(a)
(b)
(c)
Figure 2-2: Proper Eye Relief
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(a)
Eye shown at proper 70mm (2.75”) eye relief distance from rear-most glass surface.
(b)
Image through sight is sharp and circular when eye is placed at or near the proper
relief distance (no scope shadow).
(c)
Image through sight when eye is too close or too far from optimal viewing distance.
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2.1 Mounting Sight to the Weapon (continued)

Mount the sight on the rail at the rail slot which is the closest match with the mount
slot bar. Apply forward pressure to the sight and rotate the throw levers towards the
back of the sight until they are parallel to the sight body.

Cheek the weapon at the normal firing position. Verify that the sight is
approximately 70mm (2.75”) in front of the eye and that a full target picture is
observed through the sight.

For extra mounting security, the mount provides slots to accommodate plastic or
wire tie wraps so that the levers can be locked into their closed position.

Mark the sight’s position on the weapon to be used as a future reference point.
2.2 Zeroing
Zeroing the SpecterOS4x aligns the point of aim (center of the reticles’ crosshairs) with the
point of impact (POI) of the weapon.
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2.2 Zeroing (continued)
Controls
 Azimuth or windage zeroing uses the azimuth adjustment dial at the front of the mount.
Rotate the azimuth zero dial clockwise to move the point of impact to the left; or anticlockwise to move the impact to the right. Each click of the azimuth dial moves the point
of impact by ½ Minute of Angle (MOA) (approximately ½” (12.7mm) at 100 yards (91m)).
Using a common item such as a flat-head screwdriver, dog tag, cartridge case or coin, rotate
the azimuth dial.

Elevation zeroing uses the elevation dial at the bottom rear of the mount. Unlock the
zeroing lock (silver tab) by raising it up as far as it will go. Be sure that the lock pin at
the bottom of the zeroing lock is fully disengaged from the elevation dial. Adjust
the elevation dial as required. Each click of the elevation dial moves the point of impact
by ½ MOA (approximately ½” (12.7mm) at 100 yards (91m). When elevation adjustment
is completed, lower the zeroing lock (silver tab) fully to lock the elevation zero in place.
Be sure that the lock pin at the bottom of the zeroing lock is fully engaged into the
elevation dial.
A mechanical zero of the sight is recommended so that the optical axis is in rough alignment
with the bore axis of the weapon. This will make zeroing easier to accomplish.
To achieve a mechanical zero of the sight, adjust the azimuth dial until the gaps between
the mount base and the front fork of the optical housing are equal. Adjust the elevation dial
by raising the silver lock and turning the dial until the sight body is parallel to the rail. (See
Figure 2-3).
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2.2 Zeroing (continued)
In addition to setting the sight to its mechanical zero, it is also recommended that the
weapon is bore sighted prior to going on the zeroing range. When done correctly, this can
save a lot of time and ammunition. Follow the steps below to acquire a good bore sight.
1. Place the weapon on a stable platform that does not allow for any movement (bench
rest, cradle, rucksack).
2. Get behind the weapon and along the barrel axis.
3. Choose an identifiable object down range (preferably at about the same range that you
will be zeroing at).
4. If possible, look through the barrel and center the object in the bore circle. Otherwise,
look parallel to the bore axis and align the weapon with an identifiable object.
5. Look through the optic and locate the identifiable object.
6. Adjust the windage and elevation until the crosshairs are on the object.
7. As necessary, perform safety checks, assemble weapon, follow range procedures and
then commence zeroing (first shot should be on paper).
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2.2 Zeroing (continued)
SIGHT BODY PARALLEL TO RAIL
= MECHANICAL ZERO
CW (POI LEFT)
CCW (POI RIGHT)
AZIMUTH/WINDAGE ADJUST
EQUAL GAPS = MECHANICAL ZERO
Figure 2-3: Azimuth/Windage Adjusts
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2.2 Zeroing (continued)
The recommended distance for zeroing the SpecterOS 4x is at 100 meters! However, a 25
meter zero will enable fall of shot to be registered on a target. It is recommended that the
marksman fires three to five round groups and make adjustments based upon the geometric
center of those groups.
1. Look through the sight with proper eye relief and align the aiming point of the center dot
onto the center of the target.
2. Fire three to five aimed individual
rounds (Figure 2-4).
Aimed fire
shot group
3. Determine the approximate center of
the group (Figure 2-5).
Sample Target
Figure 2-4: Aimed fire shot group
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2.2 Zeroing (continued)
Determine approximate
center of group
Sample Target
Figure 2-5: Determine approximate center of group
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2.2 Zeroing (continued)
4. Measure the amount of movement required left or right (Azimuth or windage) to move the
center of the POI group onto the aimpoint in mm or inches (Figure 2-6).
5. To adjust azimuth/windage, each click of the azimuth/windage dial moves the POI by ½
MOA (approximately ½” (12.7mm) at 100 yards (91m)). Direction of POI change is
labelled on the housing next to the Azimuth Adjustment Dial. Table 2.1 is provided to
convert mm or inches into a ½ MOA click of movement for a given target range.
Calculate the number of clicks to adjust the POI to the aimpoint for your target’s range.
AZIMUTH/WINDAGE
ELEVATION
Sample Target
Figure 2-6: Adjust azimuth/windage or elevation
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2.3 Zeroing (continued)
Calculation for _______ Range to Target:
Measured from ______ mm or inches
= clicks to adjust
Conversion factor for that range
LEFT
RIGHT
R
L
Bullet Impact
Aimpoint
Adjust CW to
move bullet
LEFT
Adjust CCW
to move bullet
RIGHT
Figure 2-7: Adjust POI - Azimuth/Windage
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2.2 Zeroing (continued)
6.
Measure the amount of movement required up or down (elevation) to move the center
of the POI group onto the aimpoint in mm or inches (Figure 2-6).
7.
Each click of the elevation dial moves the POI by ½ MOA (approximately ½” (12.7mm)
at 100 yards (91m)). Table 2-1 is provided below to convert mm or inches into a ½
MOA click of adjustment for a given target range. Calculate the number of clicks to
adjust the POI to the aimpoint for your target’s range.
To adjust elevation:

Push the elevation zero lock (silver tab) up to disengage.

When viewing the sight from the rear, rotate the elevation dial Right to Raise - UP
the POI or Left to Lower - Down the POI. Direction of POI change is labelled on the
sight.
Caution: To prevent damage, be sure that the lock is fully disengaged
before attempting to turn the elevation dial!

When elevation adjustment is completed, lower the zero lock fully to lock the
elevation zero in place. Be sure that the lock pin at the bottom of the zero lock is
fully engaged into the elevation dial.
It is important to ensure that the zero lock is pushed back down
to lock the elevation zero dial when zeroing is completed!
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2.2 Zeroing (continued)
Calculation for _______ Range to Target:
Measured from ______ mm or inches
= clicks to adjust
Conversion factor for that range
U
P
Bullet Impact
D
O
W
Aimpoint
1. Lift tab to unlock elevation zero.
2. Rotate dial UP/DN to move bullet UP/DN.
3. Lower tab to lock elevation zero.
Figure 2-8: Adjust POI - Elevation
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2.2 Zeroing (continued)
Range to Target
Meters
Conversion Factor
Feet
POI Movement in mm/
click of adjustment
POI Movement in in/
click of adjustment
10
32.8
1.58
0.06
25
82
4
0.10
50
100
164
328
7
15
0.30
0.60
200
656
29
1.10
300
984
44
1.70
400
1312
58
2.30
500
1640
73
2.90
600
1968
87
3.40
700
2297
102
4.00
800
2625
116
4.60
1000
3280
145
5.70
1500
4920
218
8.60
2000
6560
291
11.50
Table 2-1: POI Movement per click of Adjustment - Azimuth or Elevation
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CHAPTER 3: PRINCIPLES OF OPERATION
3.1 Reticle and Ranging
The SpecterOS 4x reticle provides the shooter with easy-to-locate aiming marks to designate
the target both at short and long ranges. The following are sample illustrations of a reticle
pattern.
4
6
4
8
6
8
10
10
M4 100- 600 m
M249 700- 1000m
4X ON LY
Figure 3-1 Sample Illustration of
Reticle -- Calibrated for
5.56, M855 ball, M4
Weapon (not to scale)
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Figure 3-2 Sample Illustration of
Reticle detail (not to scale)
Copyright © 2011 Raytheon ELCAN Optical Technologies
3.1 Reticle and Ranging (continued)
Describing the sample reticle, the main horizontal line provides a reference to the marksman
and coincides with the 100 meter aiming point. The reticle pattern is designed to be zeroed at
100 meters.
A red dot aiming point is placed at the reticle crosshair center and is 1.5 MOA in size.
The ballistic drop reticle provides calibrated drop increments of 100 meters. The 400 and 600
meter stadia lines are labelled. At each range, the width of the stadia line represents a 19”
wide target (the approximate width of a man’s chest).
The calibre of the weapon (5.56mm or 7.62mm) is indicated on the reticle as well as the sight.
3.2 Reticle Illumination
The SpecterOS 4x provides illumination for two types of reticles (see Figure 2-8):

A red dot at the center of the crosshairs; and

A Range Estimating and Bullet Drop Compensation Reticle.
Each reticle has multiple brightness settings which can be set by the Reticle Illumination
Switch (rotary) on the left side of the sight (see Figure 2-9):

Counter Clockwise rotation - illuminates the Red Dot with 5 intensity levels.

Clockwise rotation - illuminates the ballistic reticle with 5 intensity levels.
The first two settings from OFF, each way, are night vision equipment compatible.
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3.2 Reticle Illumination (continued)
5 RED DOT INTENSITY LEVELS
2 NIGHT VISION
4
6
8
10
5 STADIA LINE INTENSITY LEVELS
2 NIGHT VISION
Figure 3-3 Sample
Illustration: Red Dot and
Illuminated Ballistic Reticle
Figure 3-4: Reticle Illumination Switch Operation - rotate the switch
to desired reticle brightness setting.
WARNING
The SpecterOS 4x is designed to give the marksman maximum control of reticle
illumination. However, at the higher illumination settings, reddish light shines forward from
the sight. These higher illumination settings are for use in bright daylight.
Failure to use the lower reticle illumination settings at night, or failure to take other tactical
measures to hide your forward light emissions during darkness, could reveal your position.
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CHAPTER 4: MAINTENANCE
The SpecterOS 4x is designed for ruggedness and minimal maintenance. The
following sections describe recommended maintenance procedures.
4.1 Preventative Maintenance
Prior to use in the field and every week of use, the following routine maintenance is
recommended:
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
Inspect the sight for missing or damaged parts.

Inspect the sight for visual obstruction of target image, dust, dirt, pits or moisture on
optical surfaces, loose or broken optical elements. If these conditions cannot be
corrected by cleaning (see Section 3.2), the sight is unsuitable for use.

Check battery cap - Ensure that the cap is present. Inspect the threads on the
battery housing and battery cap for damage, dirt or moisture. Ensure that the rubber
washer is present, free of damage and seated properly. An absent or improperly
seated battery cap could lead to a loss of power or shorten battery life.

Check the reticle - if the reticle does not illuminate, try replacing the battery.

Verify proper positioning and mounting of the sight (see Section 2.1).
OPM 009 REV A
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4.2 Changing the Battery
The battery cap is located on the Reticle Illumination Switch. To change the battery:

Grip the large diameter switch to prevent it from rotating while turning the small
diameter section in a counter-clockwise direction.

Remove the old battery and dispose of it properly (see note below).

Place a new DL1/3N Lithium battery into the compartment with the “-” terminal
facing in.

Replace battery cover (hand tighten only). See Figure 4-1.
Figure 4-1: Battery Replacement
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4.3 Cleaning
Clean the surfaces of the optical sight lenses by using cotton lens paper, microfiber or
freshly laundered cheesecloth saturated with alcohol to wipe in a circular motion. Dry the
lens by wiping with a clean piece of the same material in the same circular motion from
the center outward.
CAUTION
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
DO NOT use fingers to clean lenses. Apply only a light downward pressure on the
cleaning material.

DO NOT immerse the SpecterOS 4x sight in solvents.

DO NOT use hot water to clean the sight.

If mud or hardened dirt is on or near the lens, flush with cold or warm water and
gently wipe with a moistened tissue. Repeat the procedure above if necessary.

DO NOT use compressed air to clean sight.
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4.4 Replacement Parts
Description
Battery cover without lanyard
Raytheon ELCAN Part Number
903236-003 (Black)
903236-001 (Flat Dark Earth)
Battery cover with lanyard
903236-003 KIT (Black)
903236-001 KIT (Flat Dark Earth)
Lens Cover
207491-003 (Black)
207491-001 (Flat Dark Earth)
Table 4-1: Replacement Parts
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4.5 Preparation for Shipment
Clean and dry the sight. It is highly recommended that the lens covers be installed to
protect the optical elements during shipment.
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1.
For shipment while attached to the weapon, make safe and properly stow the
weapon.
2.
For shipment as an individual sight, reinsert the sight into its original packaging, or
equivalent, to cushion against impact and prevent crushing.
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OPM 009 REV A
Copyright © 2011 Raytheon ELCAN Optical Technologies
450 Leitz Road, Midland ON
Canada L4R 5B8
Telephone: 011.705.526.5401
www.ELCANsightingsystems.com
Dated January 10, 2011
Copyright 2011, Raytheon ELCAN Optical Technologies.
All rights reserved. Specifications are subject to change.
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