New Orleans rapper Mystikal has been transferred to the Louisiana State Penitentiary.

Mystikal's now serving 20 years at Angola Prison where his former No Limit label mate C-Murder is already locked up for life.

Mystikal's now doing hard time behind bars ... because he was just transferred to the notorious Angola Prison in Louisiana ..

New Orleans rapper Mystikal, whose real name is Michael Tyler, was transferred to Angola to serve a 20-year sentence after ...