Posted: 2/1/2012 2:19:41 PM EDT
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I have a thread-on suppressor on which the threads are somewhat recessed in the can, and there is a taper cut behind the threads that looks like it could mate up to a taper cut into the barrel shoulder.
Do you accept customer's cans along with the barrel in order to match the threads/mount/shoulder? If so, does it require a Form 5, or can we still send NFA stuff for gunsmithing wihhtout a transfer? And could your barrel threader match a taper cut? Thanks! |
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Actually, the taper is in the can. It's a Soundtech can and is like the YHM can (and like the taper mating surface added to the new AAC mount).
I'd like to add the taper to the barrel shoulder, but it would be impossible to do without the can. Thanks for the reply! |
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No, but on closer inspection I don't think it's intended to be a tapered mating surface.
The problem I seem to have is that the hole in the end cap is .6875, but my barrel is .750, so the barrel shoulder rests against the back of the can and not the recessed shoulder. I am worried that there is not enough thread engagement. I guess I need a step cut in the barrel shoulder less than .6875 dia so that the barrel shoulder can snug up the recessed shoulder in the can. Maybe needs to cut about 3/8 in deep. I figured it would just be easier to send the can with the barrel and let someone who knew what they're doinng figure it out. Here's a pic: 
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Quoted:
No, but on closer inspection I don't think it's intended to be a tapered mating surface. The problem I seem to have is that the hole in the end cap is .6875, but my barrel is .750, so the barrel shoulder rests against the back of the can and not the recessed shoulder. I am worried that there is not enough thread engagement. I guess I need a step cut in the barrel shoulder less than .6875 dia so that the barrel shoulder can snug up the recessed shoulder in the can. Maybe needs to cut about 3/8 in deep. I figured it would just be easier to send the can with the barrel and let someone who knew what they're doinng figure it out. Here's a pic: http://img.photobucket.com/albums/v204/kenc3/DSCN1408.jpg That's a thread relief. |
| With the barrel shoulder hitting the back of the can, the only way there could anywhere near enough thread engagement would be if the barrel threads were at least .700 long. There is no way that a standard .500 thread length would provide more than .250 of engagement. The can tightens after less than 4 full revolutions. |
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Quoted:
With the barrel shoulder hitting the back of the can, the only way there could anywhere near enough thread engagement would be if the barrel threads were at least .700 long. There is no way that a standard .500 thread length would provide more than .250 of engagement. The can tightens after less than 4 full revolutions. send the suppressor back to the manufacturer and have them fix it. The barrel is fine, the threading on the can is crap and needs fixed. If you want to send us your barrel, we can extend the threads, but the problem is the can. |