Figure 2-38. 155mm DP projectiles.
predetermined time in flight, the grenades are expelled, and they arm themselves while falling. They function
upon impact. The color code for the M864 projectile is an olive-drab body with yellow diamonds and markings.
Its DODIC is D864.
Chemical projectiles are used for screening, signaling, spotting, and illumination. Those containing WP have an
added incendiary effect.
Examples of 155-millimeter smoke projectiles are shown in Figure 2-39. M110-series projectiles contain a WP
smoke filler. Their bodies have a base, an ogive, and a lifting plug. These are bursting-type munitions that may
be fuzed with an MTSQ or a PD fuze. Their color code is a light-green projectile with one yellow band and red
markings. The DODIC for the M110 series is D550.
M825-series munitions are also WP smoke projectiles. They have an all-steel body with a lifting plug in the nose.
These are burning-type, base-ejection projectiles that use the M577 MT fuze only. In flight, the functioning of the
MT fuze ignites the expelling charge, causing ejection of the payload. The major difference between models in
the M825 series is that the M825A1 has an improved payload and uses a steel base, while the M825 uses an
aluminum base. The color code for the M825 is a light-green body with one yellow band and light-red markings.
The color code for the M825A1 is the same, except that it also has a light-red band near the nose of the projectile.
The DODIC for both projectiles is D528.
M116-series projectiles have a white (HC) smoke filler. They are constructed of steel, and have a threaded and
pinned base plug and a lifting ring. These are a base-ejection, burning-type projectiles. They are fuzed with MT
and MTSQ fuzes. Their color code is a light-green body with black markings. An additional band of three white
"C"s grouped together indicates the color of the smoke. The DODIC for the M116A1 is D506. The DODIC for the
M116 and the M116B1 is D548.