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.
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.
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.
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.
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.
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.
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.
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.