Figure meter boresight target and meter zero offset Ammunition Types And Characteristics

This paragraph provides information on different types of standard military ammunition used in the M16-/M4-series weapons (Figure 2-42, page 2-28). Use only authorized ammunition manufactured to U.S. and NATO specifications. (Figures 2-43 through 2-47 [pages 2-28 through 2-30] show ammunition trajectory data.)

a. Cartridge, 5.56-mm, Ball, M193. The M193 cartridge is a center-fire cartridge with a 55-grain, gilded metal-jacketed, lead alloy core bullet. The M193 round is the standard cartridge for field use with the M16A1 rifle and has no identifying marks (1, Figure 2-42, page 2-28).

b. Cartridge, 5.56-mm, Tracer, M196. (Used in the M16A1 rifle) The M196 cartridge has a red or orange painted tip (2, Figure 2-42, page 2-28). Its main uses are for observation of fire, incendiary effect, and signaling. Soldiers should avoid long-term use of 100 percent tracer rounds, which could cause deposits of incendiary material, or chemical compounds that could damage the barrel. Therefore, when tracer rounds are fired, they are mixed with ball ammunition in a ratio of no greater than one-to-one with a preferred ratio of three or four ball rounds to one tracer round.

c. Cartridge, 5.56-mm, Dummy, M199. (Used in all rifles.) The M199 dummy cartridge is used during dry firing and other training (3, Figure 2-42, page 2-28). This cartridge can be identified by the six grooves along the sides of the case beginning about 1/2 inch from its tip. It contains no propellant or primer. The primer well is open to prevent damage to the firing pin.

d. Cartridge, 5.56-mm, Blank, M200. (Used in all rifles.) The M200 blank cartridge has no projectile. The case mouth is closed with a seven-petal rosette crimp and shows a violet tip (4, Figure 2-42, page 2-28).

e. Cartridge, 5.56-mm, Ball, M855. (Used in the M16A2/3/4 and M4-series weapons.) The M855 cartridge has a 62-grain, gilded metal-jacketed, lead alloy core bullet with a steel penetrator. The primer and case are waterproof. This round is also linked and used in the M249. It has a green tip (5, Figure 2-42, page 2-28). This ammunition should not be used in the M16A1 except under emergency conditions, and only at targets less than 90 meters in distance. (The twist of the M16A1 rifling is not sufficient to stabilize the heavier projectile of the round).

f. Cartridge, 5.56-mm, Tracer, M856. (Used in the M16A2/3/4 and M4-series weapons.) The M856 tracer cartridge has characteristics similar to the M196 tracer with a slightly longer tracer burnout distance. This cartridge has a 63.7-grain bullet. The M856 does not have a steel penetrator. It has a red tip (orange when linked 4 to 1 for the M249) (6, Figure 2-42, page 2-28). This ammunition should not be used in the M16A1 except under emergency conditions, and only at targets less than 90 meters in distance. (The twist of the M16A1 rifling is not sufficient to stabilize the projectile of the heavier ammunition).

g. Cartridge, 5.56-mm Short-Range Training Ammunition (SRTA), M862. (Used in all rifles.) The M862 SRTA (7, Figure 2-42, page 2-28) is designed exclusively for training. It can be used in lieu of service ammunition on indoor ranges and by units that have a limited range fan that does not allow the firing of service ammunition. SRTA ammunition must be used with the M2 training bolt.

(1) Although SRTA closely replicates the trajectory and characteristics of service ammunition out to 25 meters, it should not be used to set battle sight zero of weapons to fire service ammunition. The settings that are placed on the sights for SRTA could be different for service ammunition.

(2) If adequate range facilities are not available for sustainment training, SRTA can be used for any firing exercise of 25 meters or less. This includes the 25-meter scaled silhouette, 25-meter alternate qualification course, and quick-fire training. SRTA can also be used for Urban Operations training. (See Appendix A for use of SRTA in training.)

h. Storage. When storing ammunition in the open is necessary, it must be raised on dunnage at least 6 inches from the ground and protected with a cover, leaving enough space for air circulation. Since moisture and high temperatures adversely affect ammunition and explosives, the following must be adhered to:

• Do not open ammunition boxes until ready to use.

• Protect ammunition from high temperatures and the direct rays of the sun.

• Do not attempt to disassemble ammunition or any of its components.

• Never use lubricants or grease on ammunition.

M199 Ammunition
Figure 2-42. Ammunition, 5.56-mm for the M16- and M4-series weapons.
Zero Chart
Figure 2-43. M855 drop during 25-meter zeroing (M16A2 at 8/3+1; M4 at 6/3).
M16 Bullet Drop
Figure 2-44. Bullet drop of M855 ammunition with M16A2 (8/3).
Bullet Drop Chart Meter Zero
Figure 2-45. Bullet drop of M855 ammunition with M4 (6/3).

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M16A2

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Figure 2-46. M4 carbine and M16A2 rifle bullet trajectory comparison.

Figure 2-46. M4 carbine and M16A2 rifle bullet trajectory comparison.

Trajectory Comparison 9mm

Figure 2-47. Bullet drop of M4/M855 during 25-meter zeroing on 6/3.

CHAPTER 3

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Responses

  • artemio
    Where to buy 100 meters zeroing target m16a2?
    4 years ago
  • BARBARA
    How a 5.56mm travel at 400meter?
    4 years ago
  • OLGA
    What is the drop of a m16a2 bullet at 300meters?
    3 years ago

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