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 Phoenix_III 
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Joined: May 2002  PA, USA
 Posts: 858 Feedback: 94% (18) |
Posted: 6/13/2012 12:21:50 PM
[Last Edit: 6/13/2012 12:28:08 PM by Phoenix_III]
THE IMAGE ABOVE IS A PAID ADVERTISEMENT Moving to an unfriendly place, and need to extend some threaded barrels into 16''. Need to do this on a .22lr, a 9mm, and a 5.56AR. All three are threaded .5x28 (standard threading it seams). I want to simply buy a metal tube (unfinished, inexpensive), and a tap to cut the threaded into the tube. I will cut to length and use silver solder to attach as required. What tools do I need? 1) Thread cutter (recommendation on brand or special version? Need straight threads of course!) 2) Tubing (inner diameter? Does the material matter much (can take being threaded, handle the little bit of pressure, etc) The items that will be extended all have straight threads (have been suppressed, no baffle strikes). Links/ideas/thoughts welcome. Thank you! [Edit. Ghetto way comes to mind. Find pipe at Home Depot or similar, take a thread protector and embed it into pipe (tack-weld or even JB weld?), and use some of my straight length piping (used to ensure concentric threads for these barrels, successfully) to ensure it is 'straight')... Kind of ghetto though... would rather tap the pipe directly.] |
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Posted: 6/13/2012 1:14:48 PM
[Last Edit: 6/13/2012 1:15:13 PM by Hawcer]
Let me get this straight...
You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? |
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Cole2534
Devil's advocate- now with moar devil!
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Joined: Jan 2008 OK, USA
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Posted: 6/13/2012 3:30:30 PM
[Last Edit: 6/13/2012 3:34:37 PM by Cole2534]
OP-
I'd look at various metal supplies to find short lengths of properly sized tubes. Ideally these will have an ID big enough to let the bullet pass, but not too big to be untapable. Aircraft Spruce and OnlineMetals come to mind, as well as McMaster. From there find someone to face and thread them in a lathe. I bet you could get a shop guy to do it at lunch for a 12 pack. here's some 304 http://www.onlinemetals.com/merchant.cfm?pid=14752&step=4&showunits=inches&id=312&top_cat=1 Pricey, but it usually has pretty good dimensional tolerance. Cut to length, face, thread, install. How long of extensions are you trying to make? Let me know if you need anymore help. Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? An SBR is not an SBR if it isn't an SBR, get it? 
By extending the barrels he's effectively destroying the short barrel portion of the gun, making it Title I. Posted Via AR15.Com Mobile |
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GNRNR
Rational Member
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Joined: Nov 2008 OK, USA
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Posted: 6/13/2012 3:35:46 PM
Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? Some states don't allow SBRs at all. |
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Redtazdog
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Joined: Dec 2002 WA, USA
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Posted: 6/13/2012 3:44:08 PM
If you can have suppressors in the state your
Moving too, you could make your barrel extensions as a shroud Making the barrel oal 16+ then you can drop a can in for use. |
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Posted: 6/13/2012 4:46:11 PM
An SBR is not an SBR if it isn't an SBR, get it?
By extending the barrels he's effectively destroying the short barrel portion of the gun, making it Title I. I guess not... Once registered as a SBR it will remain a registered SBR regardless of barrel length unless it is removed off the registry. It they are registered sbr's, he'll have to notify the atf of the address change or request the removal from the registry anyway. Just lengthening the barrel won't cut it... That's kinda like saying...I no longer have a registered suppressor because I hollowed it all out, so it's no longer a suppressor. Am I wrong? |
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Cole2534
Devil's advocate- now with moar devil!
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Joined: Jan 2008 OK, USA
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Posted: 6/13/2012 4:56:37 PM
[Last Edit: 6/13/2012 5:18:51 PM by Cole2534]
Originally Posted By Hawcer:
From an NFA perspective, yes. Local laws, I dunno.
An SBR is not an SBR if it isn't an SBR, get it?
By extending the barrels he's effectively destroying the short barrel portion of the gun, making it Title I. I guess not... Once registered as a SBR it will remain a registered SBR regardless of barrel length unless it is removed off the registry. It they are registered sbr's, he'll have to notify the atf of the address change or request the removal from the registry anyway. Just lengthening the barrel won't cut it... That's kinda like saying...I no longer have a registered suppressor because I hollowed it all out, so it's no longer a suppressor. Am I wrong? Your suppressor analogy holds no water; suppressors and MG's are not bound by their features, rather they are inherently what they are. This is how a RDIAS is an MG without so much as a barrel or bolt. SBR's, AOW's, SBS's are built of their features, and can be demilled by their features. NFA Handbook, Chapter 2, Section 2.5
Firearms, except machineguns and silencers, that are subject to the NFA fall within the various definitions due to specific features. If the particular feature that causes a firearm to be regulated by the NFA is eliminated or modified, the resulting weapon is no longer an NFA weapon. For example, a shotgun with a barrel length of 15 inches is an NFA weapon. If the 15- inch barrel is removed and disposed of, the remaining firearm is not subject to the NFA because it has no barrel. Likewise, if the 15 inch barrel is modified by permanently attaching an extension such that the barrel length is at least 18 inches and the overall length of the weapon is at least 26 inches, the modified firearm is not subject to the NFA. NOTE: an acceptable method for permanently installing a barrel extension is by gas or electric steel seam welding or the use of high temperature silver solder having a flow point of 1100 degrees Fahrenheit. http://www.atf.gov/publications/download/p/atf-p-5320-8/atf-p-5320-8-chapter-2.pdf OP, I apologize for the derailment. Hopefully I covered you in my original post. Edited for clarity. Posted Via AR15.Com Mobile |
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AeroE
I was Free Born
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Joined: Nov 2000 MO, USA
Posts: 40044 Feedback: 100% (2) Link To This Post |
Posted: 6/13/2012 11:04:50 PM
Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? I'm more amazed at the desire to ghetto NFA firearms, even SBR's. And then discuss welding the tubes to the barrels. |
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RocketmanOU
Inventor, CEO...more importantly, RIFLEMAN
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Joined: Apr 2010 OH, USA
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Posted: 6/14/2012 9:02:21 AM
Seriously, unless you think that you'll never leave that state and/or their laws will never change, I'd pull the barrel off the receiver, store it somewhere else (mail it to your brother, something) with the tax stamp, and in the event your circumstances change, you've still got your SBR. Assuming this is for an AR, barrel swaps are awfully easy.
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Cole2534
Devil's advocate- now with moar devil!
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Joined: Jan 2008 OK, USA
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Posted: 6/14/2012 9:46:52 AM
Originally Posted By AeroE:
Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? I'm more amazed at the desire to ghetto NFA firearms, even SBR's. And then discuss welding the tubes to the barrels. Silver soldering some tubes on should not be that bad. Posted Via AR15.Com Mobile |
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AeroE
I was Free Born
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Posts: 40051 Feedback: 100% (2) Link To This Post |
Posted: 6/14/2012 12:24:54 PM
Originally Posted By Cole2534:
Originally Posted By AeroE:
Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? I'm more amazed at the desire to ghetto NFA firearms, even SBR's. And then discuss welding the tubes to the barrels. Silver soldering some tubes on should not be that bad. Posted Via AR15.Com Mobile What I'm seeing is that just any ol' material will be used, cut to some length, maybe filed more or less square to the world, and then attached, maybe by welding, maybe by soldering. We should hope for at least some degree of craftsmanship, but I guess I'm just picky. |
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Cole2534
Devil's advocate- now with moar devil!
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Joined: Jan 2008 OK, USA
Posts: 11838 Feedback: 100% (9) Link To This Post |
Posted: 6/14/2012 12:28:37 PM
Originally Posted By AeroE:
Originally Posted By Cole2534:
Originally Posted By AeroE:
Originally Posted By Hawcer:
Let me get this straight... You have multiple short barreled weapons and need to extend the barrels to 16" so they are of legal length wherever you are moving to? Don't you have SBR stamps for them? and wouldn't it still be a registered SBR regardless of the extended barrel length? Is it unlawful to have a registered SBR's where you are moving to? Am I missing something? I'm more amazed at the desire to ghetto NFA firearms, even SBR's. And then discuss welding the tubes to the barrels. Silver soldering some tubes on should not be that bad. Posted Via AR15.Com Mobile What I'm seeing is that just any ol' material will be used, cut to some length, maybe filed more or less square to the world, and then attached, maybe by welding, maybe by soldering. We should hope for at least some degree of craftsmanship, but I guess I'm just picky. It seems that way... Posted Via AR15.Com Mobile |
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Posted: 6/21/2012 8:42:48 PM
Unless I am reading this wrong, or the barrels are under 10.5", wouldn't this work: 5.5" Flash Hider
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Redtazdog
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Posted: 6/25/2012 11:56:59 PM
Originally Posted By CFCNC:
Unless I am reading this wrong, or the barrels are under 10.5", wouldn't this work: 5.5" Flash Hider You will need a barrel that's at least 11.1" or longer for that flash hider to work, you forgot to subtract the muzzle thread length
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Posted: 7/5/2012 10:25:51 AM
Barrel in question is under 10.5''
Thank you for the replies. To all the legal eagles, I am utilizing the 'it was a pistol, and now it's a rifle' recent ruling, meaning that I have (as pistols), firearms that are no good, but if they had a stock and a 16'' barrel (and are now rifles), they are good to go. Barrels are pinned/non-removable (mp5 clones). I got my 1/2-28 tap, yay! Still researching ideas. Local friend recommended... Thicker outside tube, 1/2'' ID, of course. Drill and tap two set screws at 3 and 9 o'clock into the tube, and silver solder THEM. That way keeping heat and solder off the barrel threads that I care about... good idea, but I will need a little tap set. Thank you for the links on the suppliers. Going back to re-read the thread! |
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Posted: 7/5/2012 5:23:20 PM
[Last Edit: 7/9/2012 6:12:12 PM by LedZeppelin]
You need less than a 1/2" ID.
The barrel is 1/2" max OD at the threads, so you need twice the thread depth smaller hole. IIRC, 28 tpi is about .023" deep, so you'd need a .454" inside diameter. Or somewhere there abouts. A slightly larger ID won't hurt too much for what is being done. |
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iiibdsiil
Could Be 0bama's Son
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Joined: Jan 2008 NC, USA
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Posted: 7/7/2012 8:48:31 AM
Any reason you don't want to pin it?
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xmission
Doomsday Machine Boy
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Joined: Mar 2009 NH, USA
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Posted: 7/9/2012 5:40:36 PM
Originally Posted By Phoenix_III:
I got my 1/2-28 tap, yay! Where'd you get it? I need to order one. Can't find one locally. |
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Gun_Crank
Machinist
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Posted: 7/9/2012 9:28:50 PM
Originally Posted By xmission:
Originally Posted By Phoenix_III:
I got my 1/2-28 tap, yay! Where'd you get it? I need to order one. Can't find one locally. McMaster, Enco, MSC, Productivity.com |
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Wangstang
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Posted: 7/9/2012 9:35:30 PM
Originally Posted By Phoenix_III:
Short Version: Moving to an unfriendly place, and need to extend some threaded barrels into 16''. Need to do this on a .22lr, a 9mm, and a 5.56AR. All three are threaded .5x28 (standard threading it seams). I want to simply buy a metal tube (unfinished, inexpensive), and a tap to cut the threaded into the tube. I will cut to length and use silver solder to attach as required. What tools do I need? 1) Thread cutter (recommendation on brand or special version? Need straight threads of course!) 2) Tubing (inner diameter? Does the material matter much (can take being threaded, handle the little bit of pressure, etc) The items that will be extended all have straight threads (have been suppressed, no baffle strikes). Links/ideas/thoughts welcome. Thank you! [Edit. Ghetto way comes to mind. Find pipe at Home Depot or similar, take a thread protector and embed it into pipe (tack-weld or even JB weld?), and use some of my straight length piping (used to ensure concentric threads for these barrels, successfully) to ensure it is 'straight')... Kind of ghetto though... would rather tap the pipe directly.] Why don't you contact the local ATF and ask them what they recomend you do. You maybe allowed to simply secure them in a family members safe who still lives in PA. Wes |
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