Can a Short Barreled Rifle Have More Than One Upper?

Published on April 2, 2026
Duration: 10:39

This video explains that owners of registered Short Barreled Rifles (SBRs), Short Barreled Shotguns (SBSs), and Any Other Weapons (AOWs) can indeed have multiple configurations for their NFA items. The presenter, drawing on his experience, details how to register these additional configurations, either during the initial Form 1 application or via a subsequent letter to the ATF. He also clarifies the distinction between permanent and temporary configurations and warns against using 'caliber multi' on Form 1.

Quick Summary

Yes, you can legally have multiple configurations for your registered Short Barreled Rifle (SBR), Short Barreled Shotgun (SBS), or Any Other Weapon (AOW). This can be done by listing intended alternate configurations on the initial Form 1 application or by sending a letter to the ATF to add configurations to an already registered firearm.

Frequently Asked Questions

Can I have more than one barrel or caliber for my registered Short Barreled Rifle (SBR)?

Yes, you can legally have multiple configurations for your registered SBR, Short Barreled Shotgun (SBS), or Any Other Weapon (AOW). This can be done by listing intended alternate configurations on the initial Form 1 application or by sending a letter to the ATF to add configurations to an already registered firearm.

How do I register an additional caliber or barrel length for my existing NFA firearm?

For an existing NFA firearm, you can add a new permanent configuration by sending a written letter to the ATF. This letter should clearly state the firearm's serial number and detail the new configuration you wish to add, such as a specific caliber barrel.

What is the difference between a permanent and temporary configuration for an NFA firearm?

A permanent configuration is the setup officially registered with the ATF. A temporary configuration, like attaching a suppressor for a specific task, does not require ATF notification as long as it's not maintained for a substantial period or in a way that could lead to law enforcement recovery.

Can I write 'caliber multi' on my ATF Form 1 application?

No, you cannot write 'caliber multi' on your ATF Form 1 application. The ATF requires you to specify a dedicated caliber for each registered configuration of your NFA firearm. They will not approve applications with 'caliber multi'.

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