Here is the story. I was at the police range shooting my ak47 pistol. I was talking to a Caption or what ever rank held about when shooting the ak47 pistol my hand goes numb because of recoil and my neck problems. He told me why don't you put a stock on it.I looked at him thinking what is he trying to do, set me up. I said isn't that against the law. He said, now this guy also does gunsmitting on the side, that as long as the stock is removable it is legal. He meant what he said. Then I started to think about those Lugers with the add on stocks. So I went to the ATF site to try to find info on this. I could not find any info about removable stocks and pistol.Was this BS or he was tellig the truth. Does any one have a ref number I could look up? Should I hide my dog?