the a203, or milkor mk-1. It’s primary feature is a fragmentation sleeve on the outside of the grenade, plus extra explosives. These cause the mei hellhound to be far more lethal than ordinary 40mm grenades.
A type of 40mm grenade, the mei hellhound is used with several types of grenade launchers, such as the m79,
Getting hit in the face with a Mei Hellhound shot from a M79 will not improve your day. Ever.