Pistols With ‘Stabilizing Braces’ Are Now NFA Short-Barreled Rifles

Art Merrill examines new law amending ATF factoring criteria for firearms with attached “Stabilizing Braces.”

posted on January 31, 2023
ATF Pistolbracejan2023 3

With the publication in the Federal Register today of Final Rule 2021R-08F, AR-15 pistols equipped with a “stabilizing brace” are immediately reclassified as short-barreled rifles (SBRs), requiring registration with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Owners have 120 days to comply with the law.

The much-awaited “Final Rule” became law today when the Department of Justice published it in the Federal Register. The final rule amends the regulatory definition of a rifle in 27 CFR Section 478.11 and 27 CFR Section 479.11 of the National Firearms Act of 1934 (NFA).

An ATF summary of changes presented in a webinar today for FFL dealers and the firearms industry stated, “The final rule’s definition of ‘rifle’ states clearly that the term ‘designed, redesigned, made or remade, and intended to be fired from the shoulder’ includes a weapon that is equipped with an accessory, component, or other rearward attachment (e.g., a ‘stabilizing brace’), that provides surface area that allows the weapon to be fired from the shoulder, provided other factors as described in the rule indicate the weapon is designed, made, and intended to be fired from the shoulder.”

ATF "Stabilizing Brace" example
From the January 31, 2023, ATF presentation with a summary of changes. On top is a firearm with a “Stabilizing Brace,” while on the bottom is one with a “Known Commercial Stock.” (Screengrab courtesy of ATF)



The ATF webinar named and explained those “other factors.” See below:

1.“(i) whether the weapon has a weight or length consistent with the weight or length of similarly designed rifles;”

ATF EXPLANATION: “This would be an indicator that shoulder-firing the weapon provides stabilization and is beneficial in firing the weapon, and thus that the firearm is designed and intended to be used this way.”

2.“(ii) whether the weapon has a length of pull…that is consistent with similarly designed rifles;”

ATF EXPLANATION: “A shoulder-fired weapon generally will have a length of pull that allows the placement of the firearm’s shouldering device against the shooter’s shoulder while also ergonomically allowing the shooter to engage the firearm’s trigger.”

“(iii) whether the weapon is equipped with sights or a scope with eye relief that require the weapon to be fired from the shoulder in order to be used as designed;”

ATF EXPLANATION: “Sights or scopes that cannot be used without shouldering the weapon indicates that the firearm is designed and intended to be fired from the shoulder.”

“(iv) whether the surface area that allows the weapon to be fired from the shoulder is created by a buffer tube, receiver extension, or any other accessory, component, or other rearward attachment that is necessary for the cycle of operations;”

ATF EXPLANATION: “An AR-type pistol with a standard 6 to 6½ inch buffer tube may not be designed and intended to be fired from the shoulder even if the buffer tube provides surface area that allows the firearm to be shoulder fired because it is required for the cycle of operations of the weapon.”

“(v) the manufacturer’s direct and indirect marketing and promotional materials indicating the intended use of the weapon; and”

ATF EXPLANATION: “The manufacturer’s marketing and promotional materials for a weapon are relevant in considering the likely use of the firearm in the general community.” Here, ATF displayed what appear to be commercial images of shooters firing from the shoulder pistols with stabilizing braces.

“(vi) information demonstrating the likely use of the weapon in the general community.”

ATF EXPLANATION: Here, ATF displayed images of shooters firing from the shoulder pistols with stabilizing braces.

ATF length of pull
From the January 31, 2023, ATF presentation with a summary of changes: “Length of pull is measured between the center of the trigger and the center of the shoulder stock.” (Screenshot courtesy of ATF)



Individuals who want to keep their former stabilizing-brace pistols that are now SBRs must register them with ATF within 120 days. Individuals who do so do not have to pay the $200 NFA transfer tax if they submit an E-Form 1 before that deadline. E-Form 1s can be submitted through a Class 3 FFL dealer licensed to deal in NFA firearms and suppressors, if that dealer is set up to submit the electronic E-Form 1s. ATF said that those in possession of these now-SBRs who do not wish to register them have four other options to comply with the law:

  1. Remove the short barrel and attach a 16-inch or longer rifled barrel to the firearm.
  2. Permanently remove and dispose of, or alter the “stabilizing brace” such that it cannot be reattached.
  3. Turn the firearm in to the local ATF office.
  4. Destroy the firearm.

The final ruling originates with the nearly 100-year-old National Firearms Act of 1934 (NFA). The first Federally enacted gun control, Congress passed the Act into law in an effort to control criminal use of fully automatic firearms, short-barreled rifles and shotguns, and suppressors by requiring their registration and payment of a $200 NFA “transfer tax.” At the time, machine guns and “sawed-off” shotguns were popular among criminals, especially among crime organizations. One famous example is “Whippet,” a Remington Model 11 with a shortened barrel used by Bonnie Parker and Clyde Barrow, so-named because they could conceal it under a long coat and “whip it” out in ambush. Clyde Barrow once said his favorite, though, was a shortened Browning BAR automatic rifle stolen from a National Guard armory.

Passage of NFA did not directly ban these firearms, but is an example of “prohibition by taxation,” as the 1934 $200 transfer tax to possess them equates to more than $4,000 in 2022 dollars—and this during the Great Depression. Oddly, Congress added suppressors to NFA with almost no discussion, and passed NFA into law following an attempted assassination of President Franklin D. Roosevelt in 1933.

On November 8, 2012, an FFL dealer submitted to ATF the first forearm “stabilizing brace,” asking if it was attached to an AR-15-type pistol, whether the brace would redefine it as an SBR. The brace was described as designed to be secured to a shooter’s forearm to assist a person with a disability, or limited strength or mobility in controlling the pistol. Based on that specific sample of stabilizing brace, ATF ruled that it was not designed to allow the pistol to be fired from the shoulder and thus did not make the pistol an SBR.

“Subsequently, numerous weapons equipped with stabilizing braces were manufactured and distributed that were different from the 2012 prototype, many of which did intend the weapon to be fired from the shoulder,” ATF said in the webinar. As of today, that defining characteristic—designed or intended to be fired from the shoulder—turns uncounted numbers of pistols into SBRs subject to regulation.



2022Uspsa Carryoptics 5
2022Uspsa Carryoptics 5

10 Tips On USPSA Stages And Stage Management

As the 2022 USPSA shooting season ended, the author made observations and recommendations for both competitors and staff.

The History Of Creedmoor Range

The 70-acre plot in Long Island was selected by Col. Henry G. Shaw, a member of the NRA’s first Range Committee and Board of Directors.

SIG Sauer Announces Acquisition of General Robotics

SIG Sauer acquires General Robotics, one of the world’s top manufacturers of tactical robotics for manned and unmanned platforms, as well as anti-drone use.

All About The Evans Repeating Rifle

The world’s first “high capacity magazine” rifle was a lever-action rifle that held 34 rounds and served in warfare in the late 1800s.

Competitors’ Corner: April 2023

Highlights from the April 2023 issue of Shooting Sports USA, the NRA’s competitive shooting journal.

Easy Stretches And Strength Movements To Alleviate Low Back Pain

Here are six great stretches and strength movements that will help build your spinal stability, so you won’t miss any matches.


Get the best of Shooting Sports USA delivered to your inbox.