Hello All, been trying to search for the answer to no avail, what i'm looking for is, do you guys know if it's legal to run a rifle reciever in a stock that has been cut behind the pistol grip thus making a rear grip pistol? assuming the OAL is kept to 26+in and the barrel length is 16+ inches. I know it's done frequently with shotguns (stock removed and pistol grip installed) just couldn't find a clear answer on a "rifle"