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LEARNING OBJECTIVES. With the aid of references, identify the characteristics and nomenclature of the ACOG scope. Without references, demonstrate the proper mounting of an ACOG to the weapon. Without references, demonstrate the use of the ACOG scope’s Bullet Drop Compensated Reticle.

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learning objectives
LEARNING OBJECTIVES

With the aid of references, identify the characteristics and nomenclature of the ACOG scope.

Without references, demonstrate the proper mounting of an ACOG to the weapon.

Without references, demonstrate the use of the ACOG scope’s Bullet Drop Compensated Reticle.

Without references, conduct maintenance on an ACOG scope.

Demonstrate by scored live fire, marksmanship up to 800meters using an M16A4/M4 MWS with an ACOG scope during daylight hours.

Demonstrate by scored live fire, marksmanship up to 300 meters using an M16A4/M4 MWS with an ACOG scope during periods of darkness/reduced visibility.

description
DESCRIPTION

The ACOG scope is a lightweight, rugged, four power optical scope.

Designed for the M4/M16A4, the ACOG provides an “auto ranging” reticle for ranges up to 800 meters.

Through the use of both fiber optic and tritium the ACOG is dual illuminated during both day and night without the use of batteries.

characteristics
CHARACTERISTICS

4x magnification.

Weight = 15.3 ounces w/M1913 rail adaptor.

32mm objective lens.

Waterproof to depth of 66 feet w/adjuster caps on.

Eye relief 1.5 inches.

Field of view at 100 yds. = 36.8 feet

Adjustments (3 clicks = 1 inch @ 100m)

characteristics cont d
The TA31F ACOG does NOT have an ocular laser protection. Do not use the scope unless you have proper eye protection (SPECS-3 laser goggles), or lasers are not in use, or risk mitigation measures are in effect.

Example, PEQ-2A in combat mode.

CHARACTERISTICSCONT’D
controls indicators
CONTROLS & INDICATORS

Fiber Optic Light Collector Tube

Ocular Lens

Flip Caps

Objective Lens

Adjuster Cap Retention Lanyard

LASER Filter Unit

SRD/killFLASH

Adjuster Protective Caps

ARD Adapter

M1913railadaptor

Mount with Thumb-Screws

Adapter/LFU/SRD Retaining Band

acog use
ACOG USE

Due to the use of tritium and fiber optic light devices the scope will allow the use of the Bindon Aiming Concept (BAC) of shooting with both eyes open.

The ACOG can be used to “scan” an area.

When a target is acquired, use the ranging reticle (if time allows) to get an accurate range to the target.

Use the range aiming point on the bullet drop compensator, and engage the target.

The scope can also be shot with holding only one eye open. (Preferred method for farther targets.)

ranging feature
RANGING FEATURE

The horizontal stadia lines represent 19 inches at the respective ranges. (between 400m & 800m they should fit the average width of the frontal view of a man shoulders).

Range your target using the width of the stadia lines. The outside legs of the Chevron equals 19 inches at 300m.

slide10

10 mils

5 mils

10 mils

TRS

TARGET REFERENCE SYSTEM

  • The TA31RCOM150 reticle includes a horizontal
  • graduated in 5 mil increments.
  • The distance from the centerpost to the first mil-bar on
  • either sideis 10 mils.
  • The horizontal mil-scale is primarily used for
  • communicating target positions.
slide11

Outside of chevron legs target ranged at 300 meters

Target engaged at center mass using the 300m post if time allows

target engagement 300 meters or less
TARGET ENGAGEMENT 300 METERS OR LESS

For target engagements requiring speed inside 300 meters place the tip of the chevron on a high chest hold.

slide20

FIELD CRAFT

Improvised adjustable reticle illumination.

slide21

FIELD CRAFT

Improvised adjustable reticle illumination

Transitional light periods

effects of wind
EFFECTS OF WIND

Same techniques of “hold-off” as with iron sights.

Use of scope allows observation of bullet impacts not on target. Note the lateral distance from the target, and place that hold off to re-adjust and fire.

moving targets
MOVING TARGETS

Utilize the same lead concept as in iron sight shooting.

Lead your target considering the following:

Speed of target

Angle of target movement

Range to target

Wind effects

moving targets cont d
MOVING TARGETS CONT’D

Angle of movement:

Angles of 0o to 15o should be engaged as stationary targets.

Understand as the angle increases more Hold-off (Offset) is needed.

moving targets cont d29
MOVING TARGETS CONT’D

If your target does not drop and you cannot observe impacts, INCREASEyour lead.

tritium safety
TRITIUM SAFETY

The ACOG scope is designed to handle field use, however severe impacts can damage the scope.

Inspect the scope prior to use and after any severe impacts for tritium lamp glow.

tritium safety cont d
TRITIUM SAFETY CONT’D

If the tritium lamp does not glow, or if you suspect it may have broken due to damage, treat the scope in the following manner:

Notify your chain of command.

Handle only with rubber gloves.

Turn in wrapped in two plastic bags.

Wash your hands.

slide33
Recommend checking every 6 months, or immediately after dropping the ACOG onto a hard surface.

Enter a dark room and look through the scope the reticle should be illuminated.

Inspection is easier if the scope is already installed on a weapon. This ensures that you are focused on the reticle pattern.

Identify inspection of tritium lamp requirements

learning objectives36
LEARNING OBJECTIVES

Demonstrate care and cleaning procedures

Without reference, properly mount the ACOG to the M16A4.

Without the aid of references, demonstrate the two methods to zero the ACOG.

slide37
If the lenses become dirty, the unit can be washed with fresh water and a clean cloth.

Be careful to wash the lenses fully before wiping them with the cloth.

The lenses could be scratched if dirt is pulled along the lens by the cloth

CARE & CLEANING PROCEDURES

mounting the acog
MOUNTING THE ACOG

Place the ACOG on the receiver rail station that is suitable for the shooters stock weld and eye relief. (Most shooters use station T9).

Tighten the interface knobs using your fingers, then apply an additional 1/8th to a 1/4th turn more with a screwdriver or multi-tool. Do not over tighten!

Always put the same amount of pressure on the interface knobs when mounting the ACOG. This affects your BZO retention.

Record the rail station! The ACOG can be removed and replaced with zero retention only if the same station is used.

Witness Marks

slide40

MOUNTED ACOG

* Location is

shooter dependant.

You do notneed your nose on the charging handle for proper eye relief!

bzo procedures
BZO PROCEDURES

ACOGs come factory preset for most M16A4 weapons, as such, only slight adjustments should be made.

DO NOT OVER ADJUST. If you feel tension increasing as you adjust, STOP. Turn the ACOG into the armory. Continued adjustment past the felt resistance will damage the scope.

The ACOG is only waterproof with the scope caps installed and not damaged. Remove and replace only when adjusting the scope, and only hand tighten.

two methods of zeroing
TWO METHODS OF ZEROING

100 meter zero

25 meter combat BZO

Zero shooting from a supported prone position using your ruck sack as a rest

technical true zero 100m
Technical:True zero (100m)

Establish a 100 meter target.

Use a good prone supported firing position if possible.

Fire 3 single rounds using thetip of the chevronas the POA/POI. (retighten then fire 3 more rounds before determining initial adjustments)

Make adjustments for a point of aim point of impact.

3 “clicks” equals 1 inch @ 100 meters for both windage and elevation.

Important: Obtain an accurate zero

slide44

100 meter BZO POA/POI

Moving the adjuster in the direction of the arrow moves the strike of the round in that direction. 3 clicks = 1” For both elevation and windage

(UP = move impact up)

(R = move impact right)

technical bzo
Technical:BZO

Important: If you BZO the ACOG, confirm true zero as soon as possible at 100m. Make adjustments as necessary.

Establish a 25 meter target.

Use a good prone supported firing position if possible.

Fire 3 single rounds using thetip of the 300m Post. (retighten then fire 3 more rounds before determining initial adjustment)

Make adjustments for a point of impact1cm belowpoint of aim.

12 “clicks” equals approximately 1 inch @ 25 meters for both windage and elevation.

Important: Obtain an accurate zero

slide46

25 meter POA/POI

POA

POI

12 clicks = 1”

For both elevation and windage

slide47

100m

Application:POA/POI

200m

300m

400-800m

importance of a perfect zero
IMPORTANCE OF A PERFECT ZERO

Althoughthe TA31F isNOT a dedicated sniper scope, the importance of obtaining a precise zero must be discussed. If the shooter accepts a 25 meter zero that is off by only 1 inch, the round will impact 32 inches off target at 800 meters. Therefore it is critical to ensure the most precise zero possible in order to use the TA31F to it’s full potential.

The next slide illustrates this importance.

importance of a perfect zero49
Importance of a perfect zero
  • Failure to obtain an accurate zero
  • Does not take into account:
    • Human error
    • Environmental conditions
    • Weapon/ammunition
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