The Prehistory animal bootlegs of the dinobots were released in two different color variations. this particular variation is the gray body with red chest much like the Transformers version.

Here's the box and styrofoam..

All dinobots except for swoop were remolded and released by this company.

Major differences compared to the real sludge.

The back has no copyright!!! its a bootleg!

Has the same stickers as Sludge except for autobot symbols.