Appendix C Lesson Outune Mm Grenade Launchers Mm

This appendix is a guide for instructors. This lesson outline is for training, from 1 to 5 hours, on the M208 or M79. The scope depends on the availability of time, equipment, and ammunition. Instruction can be given in unit areas during non-scheduled periods in subjects such as firing positions, sighting and aiming, and range determination.

C-l. Period I. Functioning of M203/M79

o. Learning Objective, The soldier can—

<1) Apply the characteristics, capabilities, and functioning of the grenade launcher.

(2) Identify the types and capabilities of standard 40-mm ammunition.

b. Lesson Outline*

(1) Characteristics of MtOS.

(а) Designed to be attached and used with the M16A1 rifle.

(d) Singlechot.

(e) Breechloaded.

(g) Adjustable sights.

(A) Maximum range.

(t) Maximum effective range for point targets.

(;) Maximum effective range for area targets.

(2) Characteristics of M79.

(a) Weight

(c) Singleshot.

(d) Breechloaded.

(/) Adjustable sights.

(g) Maximum range.

(A.) Maximum effective range for point targets.

(<) Maximum effective range for area targets.

V) Rate of fire. (8) Functioning of M203.

(b) Cocking (extraction and ejection).

(4) Functioning of M79.

(б) Cocking (extraction and ejection), (c) Firing.

(5) Ammunition.

(a) Authorized standard A and developmental ammunition.

(b) Effective casualty radius.

(c) Identification by color and form.

(«) Functioning of high explosive rounds.

(6) Summarize.

C-2. Period II. Preparatory Marksmanship a. Learning Objective. The soldier can apply the steps of preparatory marksmanship with the M208/M79.

b. Lesson Outline.

(1) Sighting and aiming with MtOS.

(c) Pointing technique.

(2) Sighting and aiming with M79.

(a) Sight picture.

(b) Sight alinement

(c) Pointing technique.

(а) Determine impact of grenade in relation to target.

(б) Sense first for range and then for de-viation.

(c) Sensing made to nearest 6 meters.

(4) Adjustment of fire.

(a) When using sight leaf of M208, use an adjusted aiming point if impact of round is leas than 50 meters from target. Sight change must be made if the impact of the round is more than 50 meters f rom tar get.

(b) When using quadrant sights of M208 -or M79 sights, use an adjusted aiming pQlpt if. impact of round is less than 25 meters from tW- * get. Sight changes must be made if the impact of the round is more than 25 meters from the target.

(5) Zeroing procedures for MBOS.

(a) Quadrant sight.

t. Select target at 200 meters.

2. Position front and rear sight perpendicular to barrel.

$. Move range selector latch rearward and reposition quadrant sight arm to 200 meters.

Choose firing position (prone).

5. Aline target with front And rear sights.

(a) Turn elevation adjustment screw clockwise to decrease range.

(b) Turn elevation adjustment screw counterclockwise to increase range.

(c) Depress sight aperture retainer.

(d) Move rear sight aperture away from barrel to move impact of round to the left

(e) Move rear sight aperture toward barrel to move impact of round to the right.

(f) Fire additional rounds aa necessary to make adjustments and confirm zero.

1. Select a target at 200 meters,

2. Raise the sight leaf.

i. Place the center mark of the windage scale on the index line on the rear of the right base. • >

4. Loosen the elevation adjustment screw on the sight leaf.

5. Place the index line on the sight leaf on the center elevation mark on the sight mount.

6. Tighten elevation adjustment screw on the sight leaf. ' •

7. Select firing position (prttie).

S. Aline the target with the front sight post of the M16A1 rifle and the 200 meter mark on the sight leaf» using correct sighting and aiming procedures.

9. Fire round. Sense the impact of the grenade and make sight adjustment» if necessary»

by loosening the elevation adjustment screw and moving the sight leaf up or down.

(a) Move sight leaf up to increase range.

(b) Move sight leaf down to decrease range.

(c) Move sight leaf to the left to move the impact of the round to the left.

(d) Move sight leaf to the right to • move the impact of the round to the right.

. (e) Fire additional rounds as necessary to make adjustments and confirm zero.

(6) Zeroing procedures with M79. v O) Select target at 200 meters.

. ( b) Set windage scale at zero. . (c) Move adjustable elevation scale until _ flush with top of rear sight frame.

(d) Set sight carrier on 200 meters.

(/) Aline target with front and rear sight.

(g) Fire round; sense; and adjust.

1. Turn elevation screw-wheel clockwise to increase range.

2, Turn elevation screw-wheel counterclockwise to decrease range.

'' .5. Turning windage knob clockwise moves impact of the round to the right.

4. Turning windage knob counterclockwise moves impact of the round to the left.

5. Fire additional rounds aB necessary to mark adjustments and confirm zero.

(7) Range determination.

(a) 100 meter units of measure method.

(&) Appearance of objects method.

(8) Firing positions with MtOS.

(а) Positions are basically the same as those of the standard service rifle.

(б) Left hand grasps the magazine of M16A1 rifle.

(c) Right hand graspe pistol grip of rifle.

(d) Right hand grasps the magazine of M16A1 rifle.

(e) Left hand grasps "handgrips.

(/) .As range to the target increases in excess of 250 meters» the grenadier must modify his position.

(g) Grenadier must maintain direct line of sight when sighting.

(9) Firing positions with M79.

(a) Left hand grasps the fore-end assembly of the M79.

<b) Right hand grasps small of the stock with finger inserted into trigger guard.

C-3. Period III. Mechanical Training and

Maintenance a. Learning Objective. The soldier can—

(1) Disassemble and assemble the grenade launcher.

(2) Maintain the grenade launcher.

b. Lesson Outline.

(1) Disassembly of M20S.

(a) Clear weapon.

<b) Depress barrel latch and slide barrel assembly forward.

(c) Into fourth hole on left side of hand-guard insert cleaning rod section and depress barrel stop. Slide barrel assembly from receiver assembly.

(d) Remove handguard and sight assembly.

(e) Depress barrel stop and slide barrel assembly from receiver assembly.

{/) To remove quadrant sight assembly, loosen mounting screw.

(2) Assembly of M20S. Reverse above procedure.

(3) Disassembly of M79 into four groups.

(c) Unscrew retaining band screw.

id) Remove fore-end assembly.

(e) Break weapon open and remove barrel from receiver.

(/) Unscrew stock assembly screw.

(g) Separate stock from receiver group.

(4) Assembly of M79. Reverse above procedure.

<5) Maintenance of M20S/M79.

(а) Run bore brush through barrel until clean.

(б) Clean firing pin retainer well <M79). (6) Summarize.

C-4. Period IV. Instruction Court* Modified a. Learning Objective. The soldier can successfully engage targets.

b. Lesson Outline.

(1) Safety precautions.

(а) Keep head behind and below muzzle.

(б) Insure overhead clearance.

(c) Be cautious when head wind is 5 miles per hour or greater.

(d) Insure sling of M203 is clear of muzzle prior to firing.

(2) Immediate action.

(a) Keep weapon trained on target.

(b) Wait 30 seconds before opening breech.

(c) Check to see if primer has been dented

(<£) Catch the ejected round and check to see if primer has been dented (M20S).

(e) Load and attempt to fire. </) Call for safety officer.

(3) Conduct firing.

Nott. Establish remedial training station on one end of the firing line. Inept aoldiera should be identified early in the firing and given individual instruction.

C-5. Period V. Qualification Firing Course a. Learning Objective. The soldier will qualify with the 40-mm grenade launcher, M203 during the conduct of the qualification firing course.

b. Lesson Outline.

(1) Orientation on the qualification firing course and safety review.

(2) Conduct of the qualification firing course.

APPENDIX D TRAINING AIDS

Figure D-l illustrates a type of chart that may be used as a training aid. Similar charts may be made of any other illustrations that instructors need. Those recommended include 2-1, 2-5, 4-1, 9-2, 9-7, and 10-4.

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