Is the OAL of an SBR Measured with the Stock Fully Extended or Collapsed?
In a previous blog article we discuss the process to measure the overall length (OAL) of your SBR for the ATF Form 1. However, we still frequently get asked what the OAL of your SBR actually means. When you are measuring the OAL of your SBR, for your ATF Form 1 or your ATF Form 4 you will need to measure the total length of your SBR with the stock fully extended. If you have any removable muzzle devices you will need to remove them, when measuring your SBR. Since the muzzle device is removable, the muzzle devices are not considered to be a part of the OAL of your SBR.
Other NFA Gun Trust and ATF Related Blog Posts
ATF Releases new paper ATF Form 1, ATF Form 4 and ATF 5320.23 Revisions
The ATF has released the new December 2025 revisions for the paper ATF Form 1, ATF Form 4.. The ATF Form 5, ATF 5320.23 and ATF 5320.20 weren't revised during this update. The previous versions o...
Trust Names with Special Characters can't use ATF eForm 4 Application
An issue with gun trust's names was recently discovered. The ATF eForm 4 won't allow you to type in most special characters in the transferee's name. Unfortunately, if your gun trust name has any...
Who can use the New ATF eForm 4?
The ATF released the eForm's site with the ATF eForm 4 that can be used by individuals to transfer NFA firearms to other individual's, gun trusts, and other legal entities. But who can use the ATF...