7.5" SBR...worth it?
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MachIVshooter
Member
Well, you're registering the lower, so 7.5 would just be one configuration. I have a 7.5, a 12.5 and a 10" .300 blk upper for my SBR.
In truth, the 7.5 is probably the most fun.
In truth, the 7.5 is probably the most fun.
The short guys are fun. I have a 5.56 pistol with a 10.5 barrel, a 8.5 9mm pistol and a 10.5 300 AAC SBR. The SBR allows a regular stock and it can run the other uppers since it was filed on a 7.5 barrel. The 9mm surprised me, cheap to shoot with the recoil of a staple gun.
Plinkin' Logs
Member
If I was going to do a 7.5 I would just put a pistol setup and a sig brace on it and call it a pistol, and save the $200, now that we got that absurd "cant hold the brace against your shoulder" crap out of the way with ATF. YMMV.
Do it, if you don't like the 7.5" you can always swap the upper to whatever configuration you like (or have multiple uppers to go on the one registered lower).
I have a 6.5" barrel upper that is super short and fun but ballisticaly it's not as good as my 10.5" upper but it's fun to swap around.
I have the sig brace as well and although I do like it, doing an SBR is better.
I have a 6.5" barrel upper that is super short and fun but ballisticaly it's not as good as my 10.5" upper but it's fun to swap around.
I have the sig brace as well and although I do like it, doing an SBR is better.
Bullnettles
Member
As said above, I'd say it's definitely worth it since you can always add another upper to the mix. I have a 223 and 300blk, 11" and 10.5", respectively. Looking back, I wish I'd registered it for a shorter barrel to throw a 9mm upper on it. (Looks like this doens't matter as long as you send a form in saying what you're doing and it's temporary.) Sig brace is ugly, IMO. Use that $130 towards a tax stamp and get whatever stock you want.
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MachIVshooter
Member
SBR is SBR; If you want to throw a 1" barrel on it, that's OK. Once registered, the only thing you are supposed to do is advise ATF if you no longer possess the parts for the configuration listed on the form 1 or 4, or if you intend to return it to title I status permanently.
Bullnettles
Member
WOW, I was told differently by my buddy/lawyer, and I'm going to show him this. I'll edit my comment. Thank you.
bikemutt
Member
Is it the case that its unlawful to assemble an AR15 sbr with a barrel shorter than what it was registered with?
Theohazard
Member
No. It doesn't matter what barrel length it was registered with; any SBR lower can have any length upper on it.bikemutt said:
You just need to own the parts required to put it back to its registered configuration, but you can swap out uppers at will. And like MachIVshooter said, if you decide to sell the original upper configuration and you want to permanently change its configuration, just notify the ATF.
bikemutt
Member
Thanks Theohazard, that's my understanding also. Post #8 cast some doubt on that which is why I asked.
Theohazard
Member
Yeah, and Natoround seems to imply that in post #4, but it's incorrect.
On a side note, Bullnettles said he was going to correct the info in post #8, but it's still not correct: You don't need to send anything to the ATF if you want to switch uppers, and it doesn't need to be temporary; as long as you simply own the parts required to put it back to the registered configuration, you're fine.
For example: If I have an SBR registered with an 11.5" barrel chambered in 5.56, I can take that upper off, throw it in my parts bin, and put an 8" 300 Blackout upper on it instead (or any other upper). I don't ever have to put the 11.5" 5.56 upper back on, and I don't need to ever tell the ATF anything.
However, if I decide to sell the 11.5" 5.56 upper (and I don't have the parts required to assemble another 11.5" 5.56 upper) then I need to notify the ATF of my SBR's new registered configuration.
On a side note, Bullnettles said he was going to correct the info in post #8, but it's still not correct: You don't need to send anything to the ATF if you want to switch uppers, and it doesn't need to be temporary; as long as you simply own the parts required to put it back to the registered configuration, you're fine.
For example: If I have an SBR registered with an 11.5" barrel chambered in 5.56, I can take that upper off, throw it in my parts bin, and put an 8" 300 Blackout upper on it instead (or any other upper). I don't ever have to put the 11.5" 5.56 upper back on, and I don't need to ever tell the ATF anything.
However, if I decide to sell the 11.5" 5.56 upper (and I don't have the parts required to assemble another 11.5" 5.56 upper) then I need to notify the ATF of my SBR's new registered configuration.
Aaron Baker
Member
Your post is completely accurate in terms of the ATF's policy on how this works. I just wanted to point out that despite the fact that the ATF wants you to update them about the new "permanent" configuration, I'm not aware of any penalty for not doing so. But I still think it's a good idea to help keep the NFA registry accurate.
Aaron
I wouldn't do a 7.5" upper in 5.56. I don't like anything shorter than 10.5 in that cartridge. The 7.5" guns can be finiky, they are absurdly blasty, and have fairly poor ballisitics. Moreover if you want to suppress it the 7.5" barrel will cause more wear. Now in 300 blk or 9x19 that is a different story. An 8" 300 blk makes a lot of sense.
You can get an 11.5" BCM upper for pretty close to that price so it's not like this 7.5" upper is such a smoking deal you shouldn't pass it by.
You can get an 11.5" BCM upper for pretty close to that price so it's not like this 7.5" upper is such a smoking deal you shouldn't pass it by.
jerkface11
Member
If you can get the whole gun for $650 stamp and all go for it. You could sell it for that much in pistol configuration.
Bartholomew Roberts
Member
I would just reiterate what Girodin said about 7.5" 5.56 AR pistols: tempermental, massive blast and flash (the flash is enough it washes out the red dot on the one I shot), loses a lot of velocity (which is what 5.56 relies on) and the increased wear on the blast baffle of a suppressor substantially shortens the life of that suppressor. If I was going that short, I'd definitely look at another caliber.
On the flip side though, when you pull the trigger and there is this giant orange fireball, the sheet metal overhead shakes and the entire firing line comes to a halt to see what someone just fired, it is kind of fun.
On the flip side though, when you pull the trigger and there is this giant orange fireball, the sheet metal overhead shakes and the entire firing line comes to a halt to see what someone just fired, it is kind of fun.
What is the source of the parts on this $450 7.5" gun? That is relatively cheap for a complete AR. Might be a good bargain, but if it runs poorly, combined with the other issues of a 7.5" gun it still might be money poorly spent.
You mean you don't have one yet? On a more serious note it seems that once people realize acquiring NFA items is not nearly the headache the people that don't have any make it out to be, they often acquire more.
You mean you don't have one yet? On a more serious note it seems that once people realize acquiring NFA items is not nearly the headache the people that don't have any make it out to be, they often acquire more.
Arizona_Mike
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Agreed. It comes down the the efficiency of the cartridge in a short barrel. I'm a huge fan of SBRs and I like my 300 BLK and 7.62x39 barrels around 10-11" (but still recognize the 300 works well at 7-8"). I have no 5.56 uppers shorter than 14.5 and that was just for an ultralight. You give up a lot ballisticly with the 5.56mm.
Mike
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