After looking more closely on GB, all models labeled as preban and bringing a high price have a slant brake. I was unable to find any rifles with a birdcage. They also have the RPK47 marking intact. Furniture is all over the place with different types and finishes. If the evil slant brake and threads were removed during the ban why would the bayo lug be intact? Also if the slant brake and threads were removed that would have to mean that someone re-threaded the barrel and added the birdcage? I am no expert and this is kind of confusing. Gonna keep researching........