Your favorite SBR length

Dezus · Jul 5, 2020

Unfortunately since the ATFs change in how they determine OAL on ARs, I've had to look at building a new rifle to comply with the People's Republic OAL requirements. Guess dragging my feet filling out another form 1 forever was a mistake

I'm curious as to what everyone's current favorite SBR setup is. I've got a suppressor waiting on a stamp and I'd like ideas for a dedicated host 5.55 SBR.

grimnar15 · Jul 5, 2020

Dezus said:
Unfortunately since the ATFs change in how they determine OAL on ARs, I've had to look at building a new rifle to comply with the People's Republic OAL requirements. Guess dragging my feet filling out another form 1 forever was a mistake

I'm curious as to what everyone's current favorite SBR setup is. I've got a suppressor waiting on a stamp and I'd like ideas for a dedicated host SBR.

The answers you seek are here:

https://youtu.be/Mxwi9fAe4s8

MacGuns · Jul 5, 2020

What type of round? You will get different answers based on different rounds. 300BLK, 5.56, 308, 9mm, etc

Dezus · Jul 5, 2020

I'm speaking specifically towards 5.56, sorry I'll edit the post

outrider58 · Jul 5, 2020

ATF didn't change it. Merryland did.
Maybe I'm not sure what you meant about "how ATF changed the way they measure".
Pretty sure they didn't.

MacGuns · Jul 5, 2020

grimnar15 said:
The answers you seek are here:

https://youtu.be/Mxwi9fAe4s8

I haven't seen that video, but I'm glad to see he prefers the same SBR configuration as mine. 11.5 BCM with suppressor.

gre24ene · Jul 5, 2020

I think Garand Thumb is liking the 13.7" now.

dannyp · Jul 5, 2020

what did maryland change ? i thought anything less than a 16" barrel was considered an sbr ? thanks , dan

Dezus · Jul 5, 2020

outrider58 said:
ATF didn't change it. Merryland did.
Maybe I'm not sure what you meant about "how ATF changed the way they measure".
Pretty sure they didn't.

They measure it with the stock collapsed or a brace removed. It used to be brace/stock fully extended was the OAL

outrider58 · Jul 5, 2020

dannyp said:
what did maryland change ? i thought anything less than a 16" barrel was considered an sbr ? thanks , dan

Depends.

teratos · Jul 5, 2020

I like 10.5-11.5’ish barrels.

Dezus · Jul 5, 2020

dannyp said:
what did maryland change ? i thought anything less than a 16" barrel was considered an sbr ? thanks , dan

It wasn't Maryland, it was the ATFs way they determine OAL of the firearm. Yes <16" is considered an SBR but also anything less than 26" is aswell. Maryland requires atleast a 29" OAL for rifles, including SBRs.

Dezus · Jul 5, 2020

teratos said:
I like 10.5-11.5’ish barrels.

I wanted to do an 11.5 but isn't that shorter than 29"?

teratos · Jul 5, 2020

Dezus said:
I wanted to do an 11.5 but isn't that shorter than 29"?

No. I have 10.5” barrels on 3 and they meet OAL requirements. Remember, measure with the stock fully extended. Some stocks get you there, some won’t.

Dezus · Jul 5, 2020

teratos said:
No. I have 10.5” barrels on 3 and they meet OAL requirements. Remember, measure with the stock fully extended. Some stocks get you there, some won’t.

Right that's what I'm saying though, the ATF changed how they measure OAL and now it's with the stock collapsed. Or is it just pistols?

teratos · Jul 5, 2020

Dezus said:
Right that's what I'm saying though, the ATF changed how they measure OAL and now it's with the stock collapsed. Or is it just pistols?

That’s for braces on pistols, not SBRs.

https://johnpierceesq.com/understan...ruling-regarding-overall-length-measurements/

outrider58 · Jul 5, 2020

Dezus said:
It wasn't Maryland, it was the ATFs way they determine OAL of the firearm. Yes <16" is considered an SBR but also anything less than 26" is aswell. Maryland requires atleast a 29" OAL for rifles, including SBRs.

I think you may be a bit confused. There have been no changes I'm aware of.
If you have something from ATF, then link it.

A barrel's length is normally measured from the bolt face, in battery, to the terminal end of a barrel. That hasn't changed.

Maybe you're confusing pistol -v- AOW?

outrider58 · Jul 5, 2020

teratos said:
That’s for braces on pistols, not SBRs.

https://johnpierceesq.com/understan...ruling-regarding-overall-length-measurements/

Listen.to him^^^
He types faster than I.

Dezus · Jul 5, 2020

outrider58 said:
I think you may be a bit confused. There have been no changes I'm aware of.
If you have something from ATF, then link it.

A barrel's length is normally measured from the bolt face, in battery, to the terminal end of a barrel. That hasn't changed.

Maybe you're confusing pistol -v- AOW?

Yeah I'm confusing the change with pistol OAL measurements.

woodline · Jul 5, 2020

For performance I think a 12.5” SBR is hard to beat. From a good barrel, the velocity is often within 100 FPS of a 14.5” barrel. If you’re willing to use specialty ammunition, a suppressed 10.5” barrel is hard to beat. 11.5” is a good compromise length.

As far as the whole OAL thing, I think people need to calm down. Unless things have changed in the past few weeks, the OAL measurements have not changed for SBRs. HOWEVER, The ATF has been measuring braced AR firearms with the brace taken off, or even only to the end of the receiver depending on firearm design (AKs get measured to the end of the receiver, as would Sig MPX/MCX, etc) At the moment, they do not include nonfunctional parts that are not permanently attached in their measurements. This really only matters if you want to put a VFG on a braced pistol and need 26”+ in OAL so you’re not creating an illegal AOW.

Your favorite SBR length

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