A fin-stabilized 37/40MM projectile of composite plastic material with a hardened, weighted ogive designed to deliver a solid burning payloads indoors. This munition is intended to be used when confronted with hardened intermediate barriers requiring a greater penetrating capability. The payloan emits hot smoke from multiple ports
Tje aluminum, waterproof dual rimmed cartridge is compatible with 37/38 launchers and M203 and M79 type launchers