substitute

The HELLHOUND 40mm Low Velocity Multi-Purpose Grenade is a fixed type ammunition designed to be fired from a 40mm Grenade Launcher M79, M203 (attached to the M16/M16A1/M16A2 rifle) or Milkor MK-1/[MGL-140]. The round consists of an A5-filled metal projectile body with a rotating band, a point-initiating-base detonating fuze with Safe and Arm technology, and a cartridge case assembly. Upon impact with the target, the firing pin is driven into the detonator, which in turn initiates the spit back charge, producing a jet which initiates the explosive train from the base forward, resulting in an armor-piercing jet of molten metal and fragmentation of the projectile body. With twice the fill amount of an M433 and a 40% increase in the shrapnel pattern and a lethal diameter out to 10 meters, the HELLHOUND will provide superior performance against both Troops in the Open and MOUT type engagements, while providing superior door-breaching capabilities.

from Master Blaster on military.com

From We Make Money Not Art, a collection of nonlethal weapons for winning at the office game: The Woodpecker! The Firefly! The Cateye!

Deep digger falls out of the sky, sticks in the ground, and then uses a cannon to chew through concrete before it explodes. It can grind through at least 10 meters of concrete while reporting its progress and coordinating with other burrow bombs to meet and greet and blow up.

I think it's behind me right now.