antitank (HEAT) round, and has a disposable launcher. The AT4 consists of a fiberglass launching tube fitted
with a firing mechanism, a sight, a carrying sling, and protective covers. The projectile body is made of aluminum.
The color code for the M136 (AT4) is a black body with yellow markings. Its DODIC is C995.
Figure 2-26. Recoilless rifle cartridge.
Tank ammunition is available in three calibers-90-millimeter, 105-millimeter, and 120-millimeter. This type of
ammunition is often referred to as gun ammunition. Tanks are direct-fire weapons, and their ammunition is
designed to be used against armored targets, light material, and personnel, as well as to provide smoke for
screening and spotting purposes. It is always fixed-type ammunition.
105-Millimeter Tank Ammunition. This ammunition is used in M60 and M1 tanks. It includes explosive and
non-explosive AT rounds, antipersonnel rounds, and smoke rounds.
Examples of 105-millimeter AT cartridges are shown in Figure 2-27. One type of 105-millimeter tank ammunition
is the M393-series AT round. These are plasticized HE cartridges with tracers designed for use against armored
targets, light material, and personnel. The projectile body is a thin-walled steel cylinder with a short, blunt ogive
and a flat base. The base of the projectile is fitted with a base-detonating (BD) fuze and a tracer. The projectile is
assembled to a brass or steel cartridge case and to an electrical primer. The color code for M393-series
projectiles is an olive-drab body with one black band and yellow markings. The DODIC for the M393 series is
M456-series rounds are HEAT cartridges with tracers. They are designed for use against armored targets.
M393-series projectiles have a steel body fitted with a plastic obturator, a threaded standoff spike, a fin and boom
assembly, a point-initiating, base-detonating (PIBD) fuse, and a cartridge case with an electrically initiated primer.
The color code for M393-series projectiles is a black body with one yellow band and white markings. The DODIC
for the M456 series is C508.
The M735 is an armor-piercing, fin-stabilized, discarding-sabot cartridge with tracer. Other than the primer and
the propellant, this cartridge uses no explosives. It is a high-velocity, flat-trajectory cartridge designed for use
against armored targets. The projectile section