Thing about the 20mm GL is that each round costs about $20.
Reason for this, those who don't know, the grenades have a computerchip in them. The reason for this is logical. Say Mr. Bad Guy decides to just plink at you from behind a brick wall. You plot in the correct info. Gun figures the tragectory and gives the grenade a firing solution. Mr. Marine aims above the brick wall, pulls the trigger. Grenade sails out and once it clears the brick wall it explodes and leaves all behind it, as a Combat Engineer I know's favorite word, into hamburger.'
Got to love The History Channel, The Discovery Channel and The Military Channel.