  The addition of mass terms in general breaks gauge symmetries which can be
recovered usually via Stueckelberg fields. The massive BF model describes
massive spin-1 particles while preserving the $U(1)$ symmetry without
Stueckelberg fields. Replacing the spin-1 curvature (field strength) by the
Riemann tensor one can define its spin-2 analogue (massive``BR'' model). Here
we investigate the canonical structure of the free mBR model in terms of gauge
invariants in arbitrary dimensions and compare with the massive BF model. We
also investigate non linear completions of the mBR model in arbitrary
dimensions. In $D=3$ we find a non linear completion in the form of a bimetric
model which is a sub case of a new class of bimetric models whose decoupling
limit is ghost free at leading order. Their spectrum consists only of massive
spin-2 particles. In arbitrary dimensions $D\ge 3$ we show that the consistency
of a possible single metric completion of the mBR model is related with the
consistency of a higher rank description of massless spin-1 particles in
arbitrary backgrounds.
