Bomastone Grenade

"The Bomastone is a ‘stick’ style fragmentation grenade with a handle designed to aid in lobbing over moderate distances."

- In-game description

The Colonial fragmentation Grenade. It has slightly more range than the Warden one and always make the targets bleed.

Historical Reference
The design and icon of the Bomastone Grenade appear to be based off the German Stielhandgranate series of grenades.