I picked up a stripped AR-15
lower receiver at a gun show a while back. My original plan was to turn it into a short barreled rifle
. Of course, this requires registering the rifle (or even the parts to build the rifle) with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (BATFE or ATF). Since it can take a while to complete the registration process, I decided to use the lower receiver to build an AR-15 pistol, instead. I can then go ahead and register my intent to build a short-barreled rifle with the ATF. Once I complete that process, I can simply buy a stock and attach it to the gun. I got a great deal on an AR-15 pistol upper receiver kit so now I can assemble the pistol.