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What SBR length would you prefer?

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Discussion Starter · #1 ·
If you were to SBR an ACR, what length would you chose & why?

10.5", 12.5", 14.5", or Stock

Guys like bigdog2003_99 (10.5"), restfortheweary (12.5"), tradingplace (12.5") , DSM (14.5"), and JR Foxtrot (14.5") have already made these modifications and judging from pictures and videos they turned out great.
 

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As it stands right now I'd want a 12.5" barrel (because I like the basic handguard over the tri-rail mostly) but I voted for 10.5". My reasoning is that if you go for 10.5" you'll have a carbine length gas system to play on different barrels in addition to the current factory mid-length. If you Form 1 says 10.5" you can still do other lengths (provided you still maintain the parts to go to your listed length) of course.

This gov't shutdown business is going to screw up getting my form back any time soon....
 

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Wasn't the concept 11.5"? I kinda like that, but wouldn't mind 12.5" but not happening in this state, unless I get a 3.5"+ brake or fake can or something like that.
 

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Discussion Starter · #4 ·
As it stands right now I'd want a 12.5" barrel (because I like the basic handguard over the tri-rail mostly) but I voted for 10.5". My reasoning is that if you go for 10.5" you'll have a carbine length gas system to play on different barrels in addition to the current factory mid-length. If you Form 1 says 10.5" you can still do other lengths (provided you still maintain the parts to go to your listed length) of course.
So if your tax tamp states an approved 10.5" you are allowed anything past that length?
 

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i'm not an attorney but from what i understand if you sbr your rifle you can go under the listed barrel length by sending a memo to atf notifying them that you intend on doing so-this is also for a permanent modification, but you might want to check around to make sure

the 11.5 was my 2nd option since i was going to run suppressed mostly anyway

which handguard do you prefer? the carbine length looks good on the enhanced and same with the mid on the basic
 

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So if your tax tamp states an approved 10.5" you are allowed anything past that length?
I'm not a lawyer either, and I didn't stay at a Holiday Inn either, but the advice from my local Class III dealer was once it is registered you can change barrel lengths to your heart's desire until you make a permanent change like bigdog stated. So, if you're form says 10.5" you can walk around with a 2" barrel if you wanted but you had better be able to maintain the 10.5" barrel. If later on you decide you'd rather stick with a 11.5" barrel and sell off the 10.5" you send a letter to the ATF stating the change is permanent.
 

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Discussion Starter · #8 ·
I'm not a lawyer either, and I didn't stay at a Holiday Inn either, but the advice from my local Class III dealer was once it is registered you can change barrel lengths to your heart's desire until you make a permanent change like bigdog stated. So, if you're form says 10.5" you can walk around with a 2" barrel if you wanted but you had better be able to maintain the 10.5" barrel. If later on you decide you'd rather stick with a 11.5" barrel and sell off the 10.5" you send a letter to the ATF stating the change is permanent.
Very interesting.......thanks
 

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That was my impression as well when SBR'ing my M4. I measured OAL for a 7.5" barrel, which covers everything as short as 7.5 and longer.
 

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Discussion Starter · #10 · (Edited)
So hypothetically could an individual get approval for a 10.5" with the intention of primarily using a 12.5"? That way they'd have the option to run a 10.5" in the future, or do they actually have to run the approved length as their primary?

On another note, I spoke with Bushmaster this morning and they informed me that the 6.8 conversion should be out by the end of the year, 7.62 conversion by early 2012, and they don't know when the their 10.5", 14.5", 18" barrels will be available. Looks like I'm going aftermarket.
 

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So hypothetically could an individual get approval for a 10.5" with the intention of primarily using a 12.5"? That way they'd have the option to run a 10.5" in the future, or do they actually have to run the approved length as their primary?
It doesn't matter. Once it is is registered, the "rule" is whatever you write on the paper is regarded as the primary configuration that the weapon will be in. Running a 14.5" barrel on a gun registered to be 10" is not going to ruffle any feathers unless you are transporting cocaine at the same time.
 

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So if I understand this so far if I get registered for a 10.5 barrel I can get a 12.5 & 14.5 for it as well? If I do this in 223/5.56 can I do in any other caliber I want since its all one rifle?
 

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Discussion Starter · #15 ·
Running a 14.5" barrel on a gun registered to be 10" is not going to ruffle any feathers unless you are transporting cocaine at the same time.
lol I love that.

So I sent out my forms today and when I was prepping the forms I was able to list the 12.5" as the length of barrel and various barrel lengths of 7.5",10.5",14.5". Under calibers I could only fit 3 (typed) 5.56, 5.45, and 7.62. Just thought I'd let you know what worked for me. Now it's time for the waiting game. I'll be ordering a Spikes Barrel in a week or two.
 

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Running a 14.5" barrel on a gun registered to be 10" is not going to ruffle any feathers unless you are transporting cocaine at the same time.
charlie sheen didnt have any troubles with that lol... (the cocaine part)

and you definitely have to do a range report with the spikes barrel, it seems like everyone that has one magically disappears once they post a pic of it...
 

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So if your tax tamp states an approved 10.5" you are allowed anything past that length?
Actually, as long as it is not a "Permanent Alteration" you are allowed any barrel length/ caliber. It's a good idea to always keep a barrel in the registered length. If you want to be extra careful, you can send a letter to AtF listing out all the configurations you might use, but again, not necessary if the change is not permanent.
 

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Thanks Jason, not clear on all the intricacies of the laws on the legal alterations... appreciate the clarification.

It was my intention to keep the stock barrel and add other shorties to the platform...... like a nice 12.5 with a suppressor
 
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