Characteristics

The M16-/M4-series weapons are 5.56-mm, magazine-fed, gas-operated, air-cooled, shoulder-fired weapons. This section describes the general characteristics (Table 2-1) and the components of the M16-/M4-series weapons. Table 2-2 (page 2-2) shows the characteristics of various accessories.

CHARACTERISTIC

M16A1

M16A2/A3

M16A4

M4

WEIGHT (pounds):

Without magazine and sling

6.35

7.78

9.08

6.49

With sling and loaded:

20-round magazine

6.75

8.48

9.78

7.19

30-round magazine

7.06

8.79

10.09

7.50

Bayonet knife, M9

1.50

1.50

1.50

1.50

Scabbard

0.30

0.30

0.30

0.30

Sling, M1

0.40

0.40

0.40

0.40

LENGTH (inches):

Rifle w/bayonet knife

44.25

44.88

44.88

N/A

Overall rifle length

30.00

39.63

39.63

N/A

Buttstock closed

N/A

N/A

N/A

29.75

Buttstock open

N/A

N/A

N/A

33.0

OPERATIONAL CHARACTERISTICS:

Barrel rifling-right hand 1 twist (inches)

12

7

7

7

Muzzle velocity (feet per second)

3,250

3,100

3,100

2,970

Cyclic rate of fire (rounds per minute)

700-800

700-900

800

700-900

MAXIMUM EFFECTIVE RATE OF FIRE:

Semiautomatic (rounds per minute)

45-65

45

45

45

Burst (3-round bursts) (rounds per minute)

N/A

90

90

90

Automatic (rounds per minute)

150-200

150-200 A3

N/A

N/A

Sustained (rounds per minute)

12-15

12-15

12-15

12-15

RANGE (meters):

Maximum range

2,653

3,600

3,600

3,600

Maximum effective range

Point target

460

550

550

500

Area target

N/A

800

600

600

Table 2-1. Characteristics of the M16-/M4-series weapons.

Table 2-1. Characteristics of the M16-/M4-series weapons.

NOTE: For further technical information, refer to TM 9-1005-319-10 and TM 9-1005-249-10.

CHARACTERISTIC S

ACCESSORY

CCO

PAQ-4C

PEQ-2A

MTWS

HTWS

weight

6.2 oz

5.78 oz

7.5 oz

4.1 lbs.

4.5 lbs.

length

4.9 in

5.5 in

6.4 in

15.5 in

18 in

height

2.5 in

1.2 in

1.2 in

6.25 in

6.25 in

range

300m

*600m+

*600m +

1,600m +

2,200m +

mounting device:

M16A1/A2/A3 M4 carbine M16A4 and M4 MWS

M16 mount

**Upper receiver

**Upper receiver

Bracket Assy Bracket Assy ***Rail grabber

Bracket Assy Bracket Assy ***Rail grabber

M16 mount Upper receiver Upper receiver

M16 mount Upper receiver Upper receiver

windage

(1 increment clockwise) Top side mounted Left side mounted

Left 4 mm

N/A

Left 1 cm Left 1 cm

3/4cm/3/4cm N/A

elevation

(1 increment clockwise) Top side mounted Left side mounted

Down 4 mm N/A

Up 1 cm Down 1 cm

Up 1 cm Up 1 cm

1 1/4cm/3/4cm N/A

3/4cm/3/4cm N/A

* Actual range is dependent upon ambient light, NVGs, and background contrast.

** With half-moon spacer installed.

*** Picatinny or Insight rail grabbers may be used.

Table 2-2. Characteristics of various accessories for the M16-/M4-series weapons.

Table 2-2. Characteristics of various accessories for the M16-/M4-series weapons.

NOTE: For further technical information on these accessories refer to TM 9-1240-413-12&P (CCO), TM 11-5855-301-12&P (PAQ-4B/C), TM 11-5855-308-12&P (PEQ-2A) and TM 11-5855-302-12&P (TWS)

a. The M16A1 (Figure 2-1) can be fired in either the semiautomatic or automatic fire mode by rotating the selector lever to the desired mode (SAFE, SEMI, and AUTO).

5855 308 12p
Figure 2-1. M16A1 rifle.

(1) Mechanically Zeroing theM16A1. Mechanically zeroing the M16A1 (Figure 2-2) is only necessary when the weapon zero is questionable, the weapon is newly assigned to the unit, or the weapon sights have been serviced. If necessary, the soldier should mechanically zero the weapon as follows:

(a) Adjust the front sight post (1) up or down until the base of the front sight post is flush with the front sight post housing (2). Then adjust the front sight post 11 clicks in the direction of UP.

(b) Adjust the rear sight windage drum (3) all the way left until it stops. Then turn the windage drum back (right) 17 clicks so the rear sight is approximately centered.

Windage Sight For Cal Rifle
Figure 2-2. M16A1 rifle mechanical zero.

(2) Battlesight Zeroing the M16A1. If necessary, the soldier should use the aperture marked "L" to battlesight zero the weapon (Figure 2-3). Table 2-3 and Table 2-4 (page 2-4) show how much one click of elevation or windage will move the strike of the round from a 25-meter zero all the way out to 500 meters.

Meter Zeroing Target M16a4
0 0

Responses

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