This thread got me thinking...something that isn't easy to do.:a23: As I watched more videos of people shouldering the "arm brace", I noticed that people were not using their common sense. Some people said that an arm brace shorter than a certain length could be used as a stock, whereas others said that it was perfectly OK to use the brace as a stock as long as the brace has not been modified. I decided to read the actual ATF letters of interpretation to share my opinions with you. I have included links to copies of the letters, so you can read them and make your own decision. I would be happy to be proved wrong in this case.
In short, as I am writing this, shouldering an
unmodified arm brace shouldn't send you to jail, BUT, and this is a big BUT,* it is very unlikely that the ATF's current policy would survive a significant court challenge. Even if arm braces survive, most of the currently sold braces could be deemed illegal. My reasoning is this: The original arm brace that was approved in 2012 worked well as an arm brace, but was so uncomfortable when used as a shoulder stock that, in ATF's view, it would never be used that way. The ATF has stated this again over the years, which could be laying the groundwork to reclassify many of today's "arm braces" as stocks. This would of course, change the status of the weapons to SBR's.** It can be argued that the approval of arm braces as a class depends upon them being too uncomfortable to be used as shoulder stocks. I will admit that I am not a lawyer, I have just laid out some of the facts as I see them. The ATF, arm brace makers and vendors probably have "lawyered up" and will be in ass-covering mode when the rifle caliber pistols start being used as SBRs in crimes. Before long, there is likely to be a "picture is worth a thousand words" of a criminal shouldering his "pistol" like a SBR.
Now for the boring part: references
My personal belief is that somebody in the ATF recognized that they had created a monster and that resulted in the 2015 ATF paper : "Open letter in the redesign of "stabilizing braces"". The 2015 letter notes that manufacturers swear up and down that arm their braced weapons were not designed to be used as SBR's. The ATF's response was, that according to this logic, anyone who shoulders an arm brace has effectively "redesigned" it into an illegal NFA item. As you might imagine, this did not go over well. Here is part of a letter from ATF to SB-Tactical. It gives you an idea of the original intent You'd have to be a heartless jerk to deny SBT's request:
Central to ATF's determination is your representation that the purpose and intent of your design, as with previously approved designs, is solely to allow shooters-particularly those with disabilities-to better support large handguns or pistols when firing one-handed…In closing, FTISB finds that the submitted sample is approved for use as a pistol stabilizing brace…
The ATF letter of 03/21/2017 responds to issues raised about the 2015 letter and uses more lawyer-speek. It backed down on the "use it like an SBR and you have redesigned it into one" stance, sort of. This letter is carefully worded to show the intent of ATF's earlier decisions. It also states "we stand by the conclusions" of the 2015 letter. They again state they did not intend for arm braces to be used as SBR's and discuss their reasoning more. The letter starts with a sentence that makes a point that they initially approved one arm brace, of a specific design, not a whole class of braces with radically different designs. This will make it easier for ATF to state that many of today's devices which were sold as arm braces never qualified in the first place. Page 2 starts:
"In 2012, ATF determined that a specific arm-stabilizing brace- marketed as a "shooter's aid" to assist in shooting large buffer tube equipped pistols- was not a shoulder stock and therefore could be attached to a firearm without that act constituting the making of a NFA firearm."
There is also this sentence that states one of the features that was important in their decision to approve that
one brace.
"With respect to stabilizing braces, ATF has concluded that attaching the brace to a handgun as a forearm brace does not "make" a short-barreled because in the configuration as submitted to and approved by FATF, is not intended to be and cannot comfortably be fired from the shoulder. (the underlined words are my emphasis).
The ATF didn't foresee braces being used as stocks because they reasoned that it would be too uncomfortable to do so. This is a designer/manufacturer responsibility. Basically, if doesn't hurt to use it, you're screwed. The importance of the lack-of-comfort as a stock is why the ATF makes such a big deal about modifying the brace:
"If, however, the shooter/possessor takes affirmative steps to configure the device for use as a shoulder stock-- for example, configuring the brace so as to permanently affix it to the end of a buffer tube (thereby creating a length that has no other purpose than to facilitate its use as a stock), removing the arm strap, or otherwise undermining its ability to be used as a brace - and then in fact shoots the firearm from the shoulder using the accessory as a shoulder stock, that person has objectively "redesigned" the firearm for the purposes of the NFA."
ATF can't utilize the "shoulder it and go to jail" policy stated in the 2015 letter because it was argued that merely holding a legal device differently can't make it illegal. But what if your arm brace never qualified as a legal arm brace in the first place....In other words, from the factory, the brace should have been too uncomfortable to use as a shoulder stock. If you do anything to make it a better or more comfortable shoulder stock or a worse arm brace, you have "redesigned" a legal pistol into an illegal SBR.
Now comes the part in the ATF letter that most vendors say means it is fine to use the brace as a shoulder stock (completely unmodified, of course). The problem is that it does not state that the shouldering is definitely OK: It actually says "maybe yes, maybe no". Take your chances.
"Therefore, an NFA firearm has not necessarily been made when the device is not re-configured for use as a shoulder stock - even if the firearm happens to be fired by the shoulder."
2015 letter:
https://www.atf.gov/file/11816/download
2017 letter:
https://www.sigsauer.com/wp-content/uploads/2017/04/atf-letter-march-21-2017.pdf
* don't any of you guys tell my wife that I was writing about big butts.:a01:
** edited to say, if the former arm brace is removed, you have a big-assed pistol rather than a SBR