Diehl DM-41 HE-Frag Shell is the standard shell

Shell (projectile)

A shell is a payload-carrying projectile, which, as opposed to shot, contains an explosive or other filling, though modern usage sometimes includes large solid projectiles properly termed shot . Solid shot may contain a pyrotechnic compound if a tracer or spotting charge is used...

 for use with the Heckler & Koch

Heckler & Koch

Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...

 HK 69 Grenade launcher and HK 79 Underbarrel Grenade Launcher. It was designed to contain most of its lethal fragmentation within a 5-meter area of effect, a measure meant to reduce "friendly fire" casualties during rapid assaults or close-in perimeter defense.

• Cartridge: 40 × 46 mm.
• Fuse(s): Point-detonating nose fuse, 4-second delay fuse, and 8-second self-destruct fuse.
• Weight (Projectile): 0.176 kg.
  • Filler: 0.03 kg of Hexal 70/30 explosive.
  • Payload: 700 2.25 mm steel balls impregnated in the shell casing.
• Weight (Shell): 0.232 kg.
• Area of Effect,
  • Lethal Fragmentation: 5 m.
  • Maximum Fragmentation: 12 m.