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81mm Mortar Round

The 81mm mortar rounds are designed for use with the M252 81mm Light Battalion Mortar System, currently fielded to all Light Infantry units in the U.S. armed forces.

M374, M374A1, M374A2 High Explosive Round

Th M374 HE cartridges are painted olive drab with yellow markings and are constructed from pearlitic malleable cast iron. They contain about 2.10 pounds (0.95 kg) of composition B explosive. The M374 cartridge is fitted with the M90 propelling charge. The M374A1 and M374A2 cartridges are fitted with the M90A1 propelling charge.

Characteristics

Dimensions
Length: 528 millimeters 20.8 inches
Weight
Weight: 4.24 kilograms 9.34 pounds
Features
Maximum range: 4 500 meters 4 921 yards
Miscellaneous
Fuze: PD M524, PD M526, PD M567, VT M532

M374A3 High Explosive Round

The M374A3 HE cartridge is constructed from pearlitic malleable cast iron and contains about 2.10 pounds (0.95 kg) of composition B explosive. It uses the M205 propelling charge, consisting of four horseshoe-shaped increments fitted around the tail. The cartridge is painted olive drab with yellow markings. It can be fitted with either the M567, M524, or M532-series fuzes.

Characteristics

Weight
Weight: 4.1 kilograms 9.5 pounds
Features
Minimum range: 73 meters 80 yards
Maximum range: 4 800 meters 5 250 yards
Effective bursting area: 34 meters 112 feet
Miscellaneous
Fuze: PD M524, PD M526, VT M532

M375A3 White Phosphorus Round

The M375A3 WP cartridge is ballistically similar to the M374A3 (HE) cartridge. It contains white phosphorus that produces white smoke on contact with air. The cartridge is painted light green and has red markings and one narrow yellow band. The cartridge uses the M205 propelling charge and is assembled with the M567 or M524-series fuze.

Characteristics

Dimensions
Length: 528 millimeters 20.8 inches
Weight
Weight: 4.24 kilograms 9.34 pounds
Features
Maximum range: 4 800 meters 5 250 yards
Miscellaneous
Fuze: PD M524, PD M567

M816 Infrared Illumination Round

The M816 Infrared Illumination Cartridge with Mechanical Time - Super Quick (MTSQ) Fuze is used to illuminate targets during night operations. Infrared Illumination greatly enhances the effectiveness of night vision devices. The round consists of a two-piece body filled with illuminating flare, M772 MTSQ fuze and tail assembly. The round is ballistically similar to the 81mm High Explosive (HE) and smoke cartridges.

Characteristics

Dimensions
Length: 647 millimeters 25.49 inches
Weight
Weight: 4.2 kilograms 9.25 pounds
Miscellaneous
Fuze: MTSQ M772

Timeline

September 2001 - Type Classification Date

M819 Red Phosphorus Round

The M819 RP cartridge has a cylindrical body and contains red phosphorus (RP) that produces white smoke on contact with air. The cartridge uses the M218 propelling charge, which consists of four horseshoe-shaped increments fitted around the tail. The cartridge is painted light green with black markings and one narrow brown band.

Characteristics

Dimensions
Length: 646 millimeters 25.43 inches
Weight
Weight: 4.63 kilograms 10.2 pounds
Features
Minimum range: 300 meters 328 yards
Maximum range: 4 875 meters 5 331 yards
Effective bursting area: 90 - 150 by 30 - 40 meters 295 - 492 by 100 - 131 feet
Burn time: 2 - 3 minutes
Miscellaneous
Fuze: MTSQ M772

Timeline

1986 - Type Classification Date

M821 High Explosive Round

The M821 HE is a British-made cartridge fitted with the US M734 multioption fuze. It is constructed from ductile cast iron and contains about 1.5 pounds (0.68 kg) of cyclonite (RDX)/trinitrotoluene (TNT) composition explosive. The aluminum tail assembly has six integral fins equally spaced around the rear, which stabilize the round in flight. The cartridge is painted olive drab with yellow markings.
M821 High Explosive Round Copyright © Sgt. Anthony Mesa, U.S. Marine Corps

Characteristics

Weight
Weight: 4.5 kilograms 10 pounds
Features
Minimum range: 83 meters 90 yards
Maximum range: 5 608 meters 6 133 yards
Effective bursting area: 40 meters 131 feet
Miscellaneous
Fuze: M734

Timeline

July 1991 - Type Classification Date

M853 Illuminating Round

The M853 cartridge has a cylindrical body that contains an illuminating candle and parachute assembly. It provides illumination for about 60 seconds with 600,000 candlepower illumination. It is assembled with the M772A1 MTSQ. It uses the M219 propelling charge. The round is range-matched to the 81mm high explosive (HE) and smoke cartridges.

Characteristics

Weight
Weight: 4.1 kilograms 9.1 pounds
Features
Minimum range: 300 meters 328 yards
Maximum range: 5 100 meters 5 577 yards
Illumination area: 1 200 meters 3 937 feet
Burn time: 1 minute
Candlepower: 600 000
Miscellaneous
Fuze: MTSQ M772, M768

Timeline

1986 - Type Classification Date

M889 High Explosive

Cartridge is of the same construction as the M821 cartridge in every detail except the fuze, which is the M935. This round is used primarily in training since it is less expensive than the M821A1, the preferred war-fighting round. However, the M889A1 is highly lethal and can be used in combat.

Characteristics

Weight
Weight: 4.5 kilograms 10 pounds
Features
Minimum range: 83 meters 90 yards
Maximum range: 5 608 meters 6 133 yards
Effective bursting area: 40 meters 131 feet
Miscellaneous
Fuze: PD M935

Timeline

July 1991 - Type Classification Date