There is bad information in this thread, and I mean no disrespect.
The manufacturer specifies what the lower designation is at the factory. It doesn't matter if the gun shop that transfers it checks the wrong box (*see felony below), the designation was established at the factory. If I transfer a full length 16" AR Rifle with a stock, I can check "handgun" all day long at the gun store, but that doesn't change the designation on the factory books.
If there was ever an issue with a receiver, it would be traced back to the manufacturer first. It would show in the manufacturer's log what the original designation was
I've seen several ads where people take BCM Lowers, and turn them into pistols. Being a BCM fanboy, I contacted them directly, as I was pretty sure you couldn't do this.
My direct correspondence below with BCM on this issue;
"Thank you for contacting us. Lower receiver groups that ship from our facility with either an SBA3 pistol brace attached or a pistol receiver extension installed will be logged out as pistol lower receiver groups. The lower receiver group that ships with only a 6-position receiver extension installed is shipped out as “Lower No Stock” so this can be made into either a pistol or rifle lower on your first build depending on whether you install a pistol brace or a stock.
Our lower receiver groups that ship out with a stock installed are logged out a rifle lower receiver groups.
For clarification, we would recommend contacting your local ATF office."
If you contact the ATF Office, you will get this quoted;
Quoting from the instructions for Form 4473
"Other" refers to frames, receivers and other firearms that are neither handguns nor long guns (rifles or shotguns), such as firearms having a pistol grip that expel a shotgun shell, or National Firearms Act (NFA) firearms, including silencers. 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, frames and receivers are still "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(B). 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, nor can these firearms be transferred to anyone who is not a resident of the State where the transfer is to take place. Also, note that multiple sales forms are not required for frames or receivers of any firearms, or pistol grip shotguns, since they are not "pistols or revolvers" under Section 923(g)(3)(A)
(Question 27) Question 24-28. Firearm(s) Description:
These blocks must be completed with the firearm(s) information. Firearms manufactured after 1968 by Federal firearms licensees should all be marked with a serial number. Should you acquire a firearm that is legally not marked with a serial number (i.e. pre-1968); you may answer question 26 with "NSN" (No Serial Number), "N/A" or "None." If more than four firearms are involved in a transaction, the information required by Section D, questions 24-28, must be provided for the additional firearms on a separate sheet of paper, which must be attached to this ATF Form 4473.
Types of firearms include, but are not limited to: pistol, revolver, rifle, shotgun, receiver, frame and other firearms that are neither handguns nor long guns (rifles or shotguns), such as firearms having a pistol grip that expel a shotgun shell (pistol grip firearm) or NFA firearms (machinegun, silencer, short-barreled shotgun, short-barreled rifle, destructive device or "any other weapon").
End quote.
To enter false information on the form 4473 would be committing a Federal felony. Therefore a stripped receiver must be marked as a receiver. If it is a stripped receiver, regardless of manufactures markings, it must be recorded as a “receiver” on the form 4473.
To answer the question posted. The ATF would consider an AR 15 receiver a long gun when the receiver is assembled as a long gun when it is transferred. Again a receiver only, is to be recorded as a receiver.
I've never once commented on a bcm pistol ad, but just had this information for myself. Until deemed relevant.
The manufacturer specifies what the lower designation is at the factory. It doesn't matter if the gun shop that transfers it checks the wrong box (*see felony below), the designation was established at the factory. If I transfer a full length 16" AR Rifle with a stock, I can check "handgun" all day long at the gun store, but that doesn't change the designation on the factory books.
If there was ever an issue with a receiver, it would be traced back to the manufacturer first. It would show in the manufacturer's log what the original designation was
I've seen several ads where people take BCM Lowers, and turn them into pistols. Being a BCM fanboy, I contacted them directly, as I was pretty sure you couldn't do this.
My direct correspondence below with BCM on this issue;
"Thank you for contacting us. Lower receiver groups that ship from our facility with either an SBA3 pistol brace attached or a pistol receiver extension installed will be logged out as pistol lower receiver groups. The lower receiver group that ships with only a 6-position receiver extension installed is shipped out as “Lower No Stock” so this can be made into either a pistol or rifle lower on your first build depending on whether you install a pistol brace or a stock.
Our lower receiver groups that ship out with a stock installed are logged out a rifle lower receiver groups.
For clarification, we would recommend contacting your local ATF office."
If you contact the ATF Office, you will get this quoted;
Quoting from the instructions for Form 4473
"Other" refers to frames, receivers and other firearms that are neither handguns nor long guns (rifles or shotguns), such as firearms having a pistol grip that expel a shotgun shell, or National Firearms Act (NFA) firearms, including silencers. 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, frames and receivers are still "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(B). 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, nor can these firearms be transferred to anyone who is not a resident of the State where the transfer is to take place. Also, note that multiple sales forms are not required for frames or receivers of any firearms, or pistol grip shotguns, since they are not "pistols or revolvers" under Section 923(g)(3)(A)
(Question 27) Question 24-28. Firearm(s) Description:
These blocks must be completed with the firearm(s) information. Firearms manufactured after 1968 by Federal firearms licensees should all be marked with a serial number. Should you acquire a firearm that is legally not marked with a serial number (i.e. pre-1968); you may answer question 26 with "NSN" (No Serial Number), "N/A" or "None." If more than four firearms are involved in a transaction, the information required by Section D, questions 24-28, must be provided for the additional firearms on a separate sheet of paper, which must be attached to this ATF Form 4473.
Types of firearms include, but are not limited to: pistol, revolver, rifle, shotgun, receiver, frame and other firearms that are neither handguns nor long guns (rifles or shotguns), such as firearms having a pistol grip that expel a shotgun shell (pistol grip firearm) or NFA firearms (machinegun, silencer, short-barreled shotgun, short-barreled rifle, destructive device or "any other weapon").
End quote.
To enter false information on the form 4473 would be committing a Federal felony. Therefore a stripped receiver must be marked as a receiver. If it is a stripped receiver, regardless of manufactures markings, it must be recorded as a “receiver” on the form 4473.
To answer the question posted. The ATF would consider an AR 15 receiver a long gun when the receiver is assembled as a long gun when it is transferred. Again a receiver only, is to be recorded as a receiver.
I've never once commented on a bcm pistol ad, but just had this information for myself. Until deemed relevant.