This basic grenade uses basic grenade technology. when the pin is pulled the the side plate falls of and then theres a short amount of time before it explodes.
The GAO frags are much like the world war 2; Mills bomb. This design may be outdated but is perfect for the forges of Camp Half-Blood. The caste shell is made of either Celestial Bronze or Stygian Iron. Making this the perfect explosive against monsters.
it can be very useful in defence and offence. For defence toss it at a group of advancing enemies, the shrapnel will then kill them off. For offence use it to get an enemy out of cover so they may be taken down.
Mortals use grenades like this