Description
This cartridge is a practice impact type round fired from 40mm Grenade Launchers M79 or the M203 (attached to the M16 series rifle).
This cartridge is a fixed round of ammunition consisting of a projectile body and a cartridge case assembly containing a propelling charge and a percussion primer. A hollow, aluminum ogive is fitted to the front end of the projectile. Fitted in the rear of the projectile is a hollow steel ball assembly containing a yellow dye marking material. An RDX booster pellet with a PD fuze assembly is threaded into a cavity at the forward side of the ball assembly. The projectile assembly is press-fitted into the cartridge case. The case is a hollow aluminum bichambered cylinder with an annealed brass propellant cup assembly fitted into the center of the cartridge base. The cup contains the propelling charge with a percussion primer in the center and acts as a high-pressure chamber. The hollow cavity in the case, which surrounds the cup, acts as a low-pressure chamber. The fuze contains an inertial ring operating through push pins and levers on the firing pin.
Hazardous Components
Filler - Yellow dye, inert (4.54 g, 0.16 oz)
M118 cartridge case
Propellant - M9, 330 mg
See Also
Source(s)
TM 43-0001-28, Artillery Ammunition (chg 11, 2003)
