"A pineapple-like ovoid, with a pull ring."
The weakest grenade in the High Explosive family. Despite being a mere MK I and dealing inferior damage, it is still quite useful as the size of the explosion is much smaller than MK II and MK III. As is noted by the Force in the infobox. As such, it allows you to use it more safely without damaging yourself.
Can be used as ammo for grenade launcher.