The 'BG-288' Jackhammer was commissioned by the Terrestrial Democratic Alliance and constructed by Thatcher Steel. The Jackhammer was built in response to a series of costly uranium mining accidents on off-world colonies, due to lax worker safety protocols, in which a slew of mining Mechs were destroyed in tunnel collapses and the worker pilots tragically killed. The reinforced chassis of the Jackhammer was designed to protect the Mech's expensive reactor and core systems in the event of an accident which immobilised or crushed the Mech. That it happened to also protect the worker pilot was of secondary consideration to the corpo.