Legal necessity of a "pistol" marked lower?
In the past I have been firmly disinterested in an AR pistol in any caliber.
However, ATF interpretations as they are currently, the availability of different length buffer tubes and/or adjustable braces, and the ability to travel across state lines easier than an SBR (I am aware that an AR pistol will cost as much or more than an SBR) have caused me to recant my previous position.
I have searched and have been unable to get a DEFINITIVE answer and source for the question...
Does the lower receiver need to say "pistol" on it to be made into a pistol legally? Can it have been a stripped receiver that has never been a rifle and was listed as "other" on the 4473?
I am aware that it can not have previously been a rifle.
Thank you for your kind assistance.
Lastly and as an aside that could be saved for a separate thread if the mods feel appropriate, what would be your recommendation for a dedicated Glock mag (9mm) lower?
TED