Reiko wielding his Crude Hammer in his MK:A Versus Render
The Crude Hammer is Reiko's weapon of choice in Mortal Kombat: Armageddon.
Given Reiko's stance as a character who both respects and envies Shao Kahn, and given how his outfit in Armageddon resembles the emperor's armor, it is likely that the Crude Hammer is wielded with the interest of further emulating Shao Kahn.
Gallery
Crude Hammer in MK:Armageddon