I keep seeing these "kits" for a lot of firearms...primarly they have all the parts but a demilled (BATF approved cuts in the reciever) reciever....now I am not into gunsmithing...and dont realy want an illeagle Class 3 in the house.... but I still feel like Im missing something with these "almost complete" firearms...most appear to be sub machine gun designs..... some simi auto stuff. What am I missing? Are they that easy to "fix"...ie make working? I know you still have to have an FFL 01 to get the recievers so whats the scam? I dismissed these as some gimmic on a few flyers but im seeing them more and more and the prices are pretty high $100-400 so I dont see people buying them to put on a wall?