M16a1 Rear Sight

Figure 3-22. M16A1 250-meter trajectory.

Figure 3-22. M16A1 250-meter trajectory.

Front And Rear Sight Post M16a2Carbine 25m

O 25M | 50M 75M 100M 125M 150M 175M 200M 225M 1 275M

42m 250m

Most combat targets are expected to be engaged in the ranges from 0 to 300 meters; therefore, the 250-meter battlesight zero is the setting that remains on the rifle. At 25 meters, the bullet is about 1 inch below line of sight, crossing line of sight at 42 meters. It reaches its highest point above the line of sight (about 5 inches) at a range of about 175 meters, crosses line of sight again at 250 meters, and is about 7 inches below line of sight at 300 meters. Targets can be hit out to a range of 300 meters with no adjustments to point of aim. (A somewhat higher hit probability results with minor adjustments to the aiming point.)

Sights. The sights are adjustable for both elevation and windage. Windage adjustments are made on the rear sight; elevation adjustments on the front sight.

Rear sight. The rear sight consists of two apertures and a windage drum with a spring-loaded detent (Figure 3-23). The aperture marked L is used for ranges beyond 300 meters, and the unmarked or short-range aperture is used for ranges up to 300 meters. Adjustments for windage are made by pressing in on the spring-loaded detent with a sharp instrument (or the tip of a cartridge) and rotating the windage drum in the desired direction of change (right or left) in the strike of the bullet.

Figure 3-23. M16A1 rear sight apertures and windage drum.

M16a1 Rear Sight Adjustment

short- range aperture

Figure 3-23. M16A1 rear sight apertures and windage drum.

M16a1 Marksmanship Aperture

long-range aperture windage drum short- range aperture long-range aperture windage drum

Front sight The front sight consists of a round rotating sight post with a five-position, spring-loaded detent (Figure 3-24). Adjustments are made by using a sharp instrument (or the tip of a cartridge). To move the front sight post, the spring-loaded detent is depressed, and the post is rotated in the desired direction of change (up or down) in the strike of the bullet.

M16a1 Rear Sight

Sight Changes. To make sight changes, the firer first locates the center of his three-round shot group and then determines the distance between it and the desired location. An error in elevation is measured vertically, while a windage error is measured horizontally. When using standard zero targets or downrange feedback targets, sight adjustment guidance on the target is provided. (See Appendix F for the elevation and windage rule.)

To raise the strike of the bullet, the firer rotates the front sight post the desired number of clicks clockwise (in the direction of the arrow marked UP in Figure 3-24). Thus, the strike of the bullet is raised but the post is lowered. He reverses the direction of rotation to move the strike of the bullet down.

To move the strike of the bullet to the right, the windage drum is rotated the desired number of clicks clockwise (in the direction of the arrow marked R, Figure 3-23). The firer reverses the direction of rotation to move the strike of the bullet to the

NOTE: Before making any sight changes, the firer should make a serviceability check of the sights, looking for any bent, broken, or loose parts. The firer must also be able to consistently fire 4-cm shot

When the soldier can consistently place three rounds within a 4-cm circle at 25 meters, regardless of group location, he is ready to zero his rifle. The front and rear sights are set as follows:

Rear sight. The rear sight consists of two sight apertures, a windage knob, and an elevation knob (Figure 3-25).

left.

groups.

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Responses

  • aziza
    How long is m16 a2 from rear sight to front sight?
    6 years ago
  • Scudamor
    WHAT IS THE nsn FOR THE REAR SIGHT ON A M16A2 RIFLE?
    5 years ago
  • Cliff
    How to adjust m16a1 rear sight?
    4 years ago
  • Abela
    What is the rear sight apature on an m16 for?
    3 years ago
  • isobel munro
    What do the marks on military m16 rear sight mean?
    3 years ago
  • Lavinia Brockhouse
    What are the two sights on the m16 rear sight aperture?
    3 years ago
  • aziz
    How to adjust m16a1 rear sights?
    3 years ago
  • JACK
    How to raise the elevation knob on m16a2?
    3 years ago
  • Lena Hay
    What is a rear drum sight?
    2 years ago
  • steffen
    What arpeture is used on a m16a2 when sighting in?
    2 years ago
  • felix wei
    What aperture is used to sight in a m16a2?
    2 years ago
  • janina
    How many clicks of windage available on an M16?
    2 years ago
  • nilde
    Which rear sight is better for a 16 inch barrel on an m16 variant 8/3 or 6/3?
    1 year ago
  • sven
    Which aperature to use when sighting in m16a1?
    1 year ago
  • jessica
    How to adjust windage ar15 a1?
    10 months ago
  • JASMINE GAUKROGERS
    Which apperature is long range on m16?
    8 months ago
  • cleo
    How use m16a1 rifle sights?
    5 months ago
  • Bilba Lothran
    What are the 2 srear sight positions used for on a M16 rifle?
    3 months ago
  • susanne werner
    How the M16A1 rear sight works?
    2 months ago
  • tapio kalliom
    How to adjust windage on a Windham m 16a1 rifle?
    1 month ago
  • cathy
    How to adjust m16a1 rear site?
    30 days ago
  • Jali
    How to adjust windage on an m16a1?
    26 days ago

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