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re: Official AR-15 thread

Posted on 4/25/24 at 8:41 am to
Posted by LoneStarTiger
Lone Star State
Member since Aug 2004
15961 posts
Posted on 4/25/24 at 8:41 am to
I have a question regarding ATF regulations

Let's suppose I currently have an AR rifle. And let's suppose I want to buy a 8.5" upper.

In order to use it on the same lower, it's my understanding I would need to go through the Form 1 process and have the lower engraved.

Are there any issues from that point going forward with swapping the uppers out and going back to a full length barrel on the registered lower?
Posted by Jon A thon
Member since May 2019
1691 posts
Posted on 4/25/24 at 9:11 am to
quote:

Are there any issues from that point going forward with swapping the uppers out and going back to a full length barrel on the registered lower?


It's my understanding from researching that once it's registered as an SBR. you can put any upper you want on it. However you should send the ATF a notice that the lower will also be used for whatever the upper is. Not sure if that matters for non NFA uppers, but would cover you for any other uppers under 16". No stamp needed, just allows then to document possible configurations I guess.
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