M792, High Explosive Incendiary with Tracer (HEI-T)
The M792 HEI-T round offers the accuracy and performance needed for light materiel and fire suppression. This round is used to destroy lightly armored vehicles and helicopters (armored and unarmored) and to suppress antitank guided missile (ATGM) positions, crew served weapons, dismounted infantry, and likely enemy positions past coaxial 7.62 mm machine gun range out to a distance of 3,000 meters. The HEI-T cartridge is a fixed type, percussion primed round. The cartridge consists of a high explosive incendiary (HEI) filled, one piece projectile body crimped to a steel cartridge case. The projectile body consists of a hollow steel body, M758 fuse, 32 grams of an HEI mix, and pressed in tracer. This round is fuzed with the M758 Point Detonating Self-Destruct (PDSD) fuze, developed and produced exclusively by Alliant Techsystems. The M758 provides superior arming delay, graze and extended range sensitivity, and self-destruct compared to existing medium caliber fuzes. Gases produced by the burning propellant discharge the projectile from the gun at 1,100 meters per second ( plus or minus 20 meters per second). On impact the fuse (M758) functions and the HEI filler detonates, dispersing the incendiary mixture in a 5 meter radius. If the projectile has not impacted at about 3,000 meters, the mechanical fuse will self detonate the round.
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