Hammer
From Warhammer 40k - Lexicanum
As a weapon, the Hammer only become truly effective when it become mechanises and is surgically mounted onto a living person. This is done quite often by the Guilds of Hive Cities to Pit Slaves who will be put to work in mines or foundries.
When these slaves escape, they will often join up with any of the numerous criminal gangs present in the underhives of such planets as Necromunda where they can use these Hammers with devastating efficiency.
The sheer pile driving force of such a mass of pneumatically driven steel is enough to shatter the most veteran gangers defences and knock them senseless to the ground.1
File:PitSlaveHammer.jpg
Necromundan Pit Slave armed with a Hammer and Autopistol.
