Help! What are these?

Found them in a back of a closet, they appear to be folded metal covered with protective wrapping. They look to be like AK 80 percent receivers, but they have no holes and they are too long. What are these things?

Peel the wrapper and find out.

peeled the wrapper, they are blank steel that has been bent into what looks like the shape of an AK receiver. There are no markings or holes in the metal. Anyone who remembers building up AK flats into receivers, have you heard of these type of non-finished receivers before?