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Posted: 6/11/2017 11:09:35 AM EDT
Hi, I want to change my barrel length on a Form 4 SBR (8.5" to 12.5").  Will this make it a Form 1 SBR and I will need to engrave the lower?  Or do I simply notify the ATF guys that I've changed the barrel length?  Thanks!

(I understand I can just build a new Upper; however, it is cheaper for me to just change the barrel.)
Link Posted: 6/11/2017 11:13:55 AM EDT
[#1]
Buy the new barrel and change it.  That's it.

ATF requests you notify them of a permanent change, by writing them a letter explaining the change, but there is no law requiring you to do so.
Link Posted: 6/11/2017 3:24:42 PM EDT
[#2]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Buy the new barrel and change it.  That's it.

ATF requests you notify them of a permanent change, by writing them a letter explaining the change, but there is no law requiring you to do so.
View Quote
Cool, this is what I figured but I wanted to ask "just in case".

Thanks!
Link Posted: 6/12/2017 9:48:08 AM EDT
[#3]
This made me curious.  What about caliber?  I haven't received the approval yet on my Form 1 but while waiting over a year, I am thinking I rather have a 6.8 instead of 300blk
Link Posted: 6/12/2017 10:32:35 AM EDT
[#4]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
This made me curious.  What about caliber?  I haven't received the approval yet on my Form 1 but while waiting over a year, I am thinking I rather have a 6.8 instead of 300blk
View Quote
Same thing, change at will with no other required action.  Send them a notifying letter if you so choose.
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