The 'AMD-65' available to us is based on a parts kit from Hungary. Some of these have actually been manufactured in Hungary on FEG SA2000M receivers. Consequently, the gun is an FEG SA2000M - only an 'AMD-65' for marketing. These Hungarian ones are made by people who must have or had some connection with the defunct FEG company and access to previously unused FEG receivers. I'm not looking a gift horse in the mouth, though. I was glad to get mine with the original 12" barrel and the SA2000M stock. What you want to look for is the original barrel. Some 'AMD-65's are made with 16" barrels and the original muzzle brake with no extension. They're probably fine but I would want the original military barrel even though it has to have nearly a 2" extension plus the brake being welded on to make the required 16". The other reciever commonly used for these is the NODAK SPUD. This becomes the legal name of the rifle on the paperwork. So, at best, you want the FEG receiver and original barrel. Here's how you tell the barrel - the sight base will be only 1/4" from the gas block and it will have either a 2" extension plus the long brake, or a Tapco one-piece brake/extension which is preferred. Many of the made-up extensions manage to get welded crooked, plus they are almost 3/4" longer than they have to be.