I picked up the bow pictured here from a pawn shop in 1990 or 1991. It came with no owner's manual or any other information, I can't even find a serial number.
I recently added the whisker biscuit after the original arrow rest broke (the finish pealed off the riser when I pulled off the remains of the original rest). The riser is aluminum I think, certainly metal of some kind, limbs are fiberglass over wood. Other than the WB, I have made no modifications. Doing a Google search on "Bear Charger compound bow" has not returned any useful information or pictures.