Once the firearm is registered as a short-barreled rifle (SBR) can I remove/change the “stabilizing brace” or attach an item marketed as a stock? If so, am I required to notify ATF in advance?

Yes, the firearm is registered as an SBR, and you can change out the “brace” device or stock for a different brace or stock.  You do not need to contact ATF/NFA because changing the brace/stock does not change the configuration of the SBR.  However, if the length of the firearm has changed you will need to notify the NFA Division.

Final Note: The SBR is not “registered” until an approved Form 1 is received from NFA. The brace cannot be substituted/replaced until that time.

Last Reviewed March 23, 2023