Agreed about the vagueness about what percent means what. Again, I'm going back into the past on these things, people at that time were buying alot of non-complete receivers and building them up. For example, people were buying flats and using a Harbor Freight hydrailic press to bend them into shape. Some were even renting a jig from someone on this site to bend their flat, then mailing the jig to another person who rented it next. This was almost 20 years ago, back when the AK part kits were plentiful and cheap. Some people jumped on the bandwagon and started selling flats, and other things like what I have.
I am just trying to see if anyone remembers these types of blanks being sold, and if so, what were they for and how much were they.