[Xringshooter]

Here is what the BATFE says (this is in the NOTICES, INSTRUCTIONS AND DEFINITIONS section of a ATF Form 4473, Revised August 2008):

This is a direct quote.

Section B
Question 18. Type of Firerarm(s): Check all boxes that apply. "other" refers to frames, receivers and other firearms that are not either hanguns or long guns (rifles or shotguns), such as firearms having a pistol grip that expel a shotgun shell, or Nation Firearms Act (NFA) firearms.

If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver, not a handgun or long gun. However, they are still "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21. Since a frame or receiver for a firearm, to include one that can only be made into a long gun, is a "firearm other than a shotgun or rifle," it cannot be transferred to anyone under the age of 21. Also, note that multiple sales forms are not required for frames and receivers of any firearms, or pistol grip firearms, since they are not "pistols or revolvers" under Section 923(g)(3)(a).

Pay particular attention to the last line (my bold). As you can see, the BATFE does not consider them handguns. BATFE Multiple Sales Forms are only filled out for handguns. This is where our argument with the PSP lays. The SP4-113 should not be filled out for receivers as they are not handguns, SBRs or SBSs. Even the BATFE agrees.

Actually, at this time, there is nothing written that directs FFL's to do this. I have not received any communication from the PSP Firearms Division directing me to do this. What I have heard is that some FFL's have be told, verbally, by people OTHER than the Firearms Division to do this. Unless it is from the office of the Firearms Division, as far as I'm concerned, I don't have to abide by it (and I don't).