Characteristics Launcher Controls And Sighting Equipment Of Mm Grenade Launcher M

Section I. CHARACTERISTICS

9-1. Description Length of barrel group----15 in (appro*)

The 40-mm grenade launcher, M79, is a single Weight of launcher shot, breakopen, breech-loading, shoulder-fired loaded _________________6.5 lbs (appro*)

weapon (fig 9-1). It consists of a receiver group. Weight of launcher fore-end assembly, barrel group, sight assembly, unloaded_______________6 lb» (approx)

and stock assembly (fig 9-2). A rubber recoil pad is attached to the butt of the stock to partially absorb the recoil. A sling is provided to carry the Caliber-------------------4°-mm weapon. Weight ------------------8 02 (approx)

c. Operational Characteristics. 9-2. Ammunition Action Breakopen,

Standard and developmental ammunition designed 8ingle ihot for use with the 40-mm grenade launcher, M208 Sights:

(fig 4-2), is used with the M79 grenade launcher. Prt>nt ----------------Blade

The grenadier carries part of his ammunition in Eear Foldln*lefti' •dJ»,rt*bl8

two universal ammunition pouches, each of which Chamber PreBsure---------8,000 lb» per »guars in.

can hold three rounds (fig 6-2). Ammunition is Muzzle velocity-----------250 ft per second.

also carried in the two-pocket bandoleer in which . ™ , 1 per^n the ammunition is packed. Each pocket contains a Maximum range----------400 m (approx)

plastic support which holds three rounds. M"<?r™ S aiso m

Maximum effective range

0. Weapons. Minimum safe firing range:

(overall)_______________29 in (approx) Combat--------------81 m

And Grenade
Figure 9-1. The 40-mm grenade launcher, M79, left eide view, with rear eight in UP position.
M590 Fore End

BARRELGROUP

SIGHT ASSEMBLY

ftfetflKVc

FORE-END ASSEMBLY

STOCK ASSEMBLY

. RECEIVER GROUP

Figure 9-2, Five major subassemblies and group* of M79.

Section II. CONTROLS

9-4. Safety

The location of the ¡safety is shown in figure 9-3. To fire the launcher the safety must be in the forward position (fig 9-4). In this position the letter F is visible near the rear end of the safety. When the letter S is visible just forward of the safety, the launcher will not fire. The safety is automatically engaged when the barrel locking latch is operated to open the breech.

9-5. Trigger and Trigger Guard Detent Assembly

M203 Grenade Launcher Characteristics

Figure 'J-i. Location of the safety in the firing position.

9—6. Barrel Locking Latch and Lever

Fxgure fl i, Location of the xafety in the safe position.

Figure 'J-i. Location of the safety in the firing position.

mils the movement of the trigger guard to the right or left and allows the grenadier to fire the weapon while wearing gloves or mittens.

9—6. Barrel Locking Latch and Lever

The barrel locking latch is on top of the receiver (fig 9-6). This latch locks the receiver and barrel together. To open (or break) the breech end of the barrel, press the barrel locking latch lever its full travel to the right.

9-5. Trigger and Trigger Guard Detent Assembly

The position of the trigger and trigger guard is shown in figure 9-G. The trigger guard protects the trigger. Depressing the detent assembly per-

Fxgure fl i, Location of the xafety in the safe position.

DETENT ASSEMBLY

M203 Grenade Launcher Characteristics

Figure 9-5> Position of trigger and trigger guard.

DETENT ASSEMBLY

Figure 9-5> Position of trigger and trigger guard.

TRIGGER GUARD

M203 Grenade Launcher Characteristics

BARREL LOCKING LUG I

Figure 9-6. Operating the barrel looking latch.

Section III. SIGHTING EQUIPMENT

9-7. Rear Sight Assembly

The adjustable rear sight assembly consists of a rear sight lock, a windage screw and windage scale, and elevation scale and lock screw, a sight carrier and retainer locknut, and elevating screw wheel and elevating screw, and a rear sight frame and fixed sight (fig 9-7).

a. Rear Sight Lock. The lock is spring loaded and permits the rear sight frame assembly to be locked in either the up or down position. To unlock the sight frame push down on the flat surface of the rear sight lock. By releasing the pressure the frame is locked in the desired position.

b. Windage, Screw and Windage Scale. The right end of the screw is a knob which turns the windage screw to adjust the rear sight for deflection. One click of the windage screw will move the impact of the grenade about 28 centimeters or 11 inches at a range of 200 meters. For right wind age turn the screw clockwise; for left windage turn it counterclockwise. The windage scale consists of a zero line in the center of the scale and 10 lines spaced equally on each side of the zero line. The rear sight assembly can be moved 42 clicks right or left of center.

c. Elevation Scale and Lock Scrciv. The scale is graduated from 75 to 375 meters in 25-meter increments and numbered at 100, 200, 300, and 375 meters. As the rear sight carrier is moved up the adjustable elevation scale, the rear sight is cammed to the left compensating for the normal right-hand drift of the projectile. The lock screw holds the elevation scale in position.

d. Sight Carrier Retainer Locknut. The retainer locknut permits the sight carrier to be moved along the elevation scale and clamps the carrier to the sight frame in the desired position. To move the sight carrier along the elevation scale turn the retainer locknut counterclockwise until it can be pushed inward. This inward pressure unlocks the sight carrier allowing it to be moved along the elevation scale. To lock the sight carrier in position, release the pressure on the retainer locknut and turn the nut clockwise until it stops.

e. Elevating Screw Wheel and Elevating Screw. The elevating screw wheel and elevating screw are used to make fine adjustments in elevation.

Turning the wheel clockwise increases the elevation setting; turning the wheel counterclockwise decreases it. When the screw is turned it moves the sight carrier along the elevation scale. One complete turn (one click) will move the impact of the round about meters at a range of 200 meters.

f. Rear Sight Frame With Fixed Sight. When the rear sight frame is in the down position the

M203 Grenade Launcher Characteristics

ELEVATING SCREW WHEEL

ELEVATION SCALE LOCK SCREW

WINDAGE SCALE

ELEVATING SCREW

SIGHT CARRIER RETAINER LOCK NUT

FIXED SIGHT

SIGHT FRAME

SIGHT LOCK*.

SIGHT CARRIER

ELEVATION SCALE

WINDAGE SCREW AND KNOB

Figure 9-7. Rear eight aeeembly.

fixed sight may be used to engage targets, at ranges up to 100 meters.

9-8. Front Sight

The front sight consists of a tapered front sight blade and two front sight blade guards (fig 9-8).

M79 Grenade Launcher Parts
Figure 9S. Front eight.

Was this article helpful?

0 0
Knife Throwing Techniques of the Ninja

Knife Throwing Techniques of the Ninja

Knife Throwing Techniques of the Ninja. span stylecolor: 000000Do you want to learn the art of throwing knives? Ever wondered how it is done to perfection every time? Well here is your chance. This book contains well over 50 pages of detailed information and illustrations all about the art of knife throwing. This intriguing book focuses on the ninja's techniques and training. This is a must for all martial artists and anyone wanting to learn the knife throwing techniques of the ninja.span

Get My Free Ebook


Post a comment