The weapon firing pin strikes the percussion primer igniting the propelling charge in the high-pressure chamber. The fuze contains an inertial ring operating through push pins and levers upon a detonator.
The cup acts as a high pressure chamber and the hollow cavity in the case, which surrounds the cup, acts as a low pressure chamber. The cup contains the propelling charge with a percussion primer in the center. The case is a hollow, aluminum bi-chambered cylinder with an annealed brass propellant cup fitted into the cartridge base. The projectile assembly is press-fitted into a cartridge case. The projectile has a hollow, one-piece aluminum body containing rotating bands.Ī hollow aluminum ogive is fitted to the front end of the projectile.Ī hollow steel ball assembly containing the bursting charge is fitted into the rear of the projectile body.Ī booster charge with a point detonating fuze is threaded into a well in the forward side of the ball. The cartridge is a fixed round of ammunition consisting of a projectile assembly and a cartridge case assembly. The M381 cartridge is a high explosive round designed to inflict personnel casualties from ground burst effect. Olive drab with yellow markings, yellow ogive
656 ft (200 meters) in diameter for 40 secondsĮngagement Range: 33 - 164 ft (10 - 50 m) 656 ft (200 meters) in diameter for 40 secondsĢ0,000 candlepower. 656 ft (200 meters) in diameter for 40 secondsĨ,000 candlepower. If fired into snow or mud, 40mm rounds may not hit hard enough to detonate.Īn undetonated round may explode when stepped on or driven over.ĭuring training in snow or mud, avoid this hazard by firing only TP rounds.ĩ0,000 candlepower. These rounds include high-explosive, illuminating, signaling, CS, training, and multi-purpose ammunition. This page describes the most commonly used 40mm low-velocity rounds for the U.S.
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