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Page AR-15 » Build It Yourself
AR Sponsor: bravocompany
Posted: 3/5/2024 6:09:04 PM EDT
Does anyone know why faxon is using M18x1.5 tapered barrel threads on their 8.6 blackout barrels? Is this some ploy by Kevin "The Grifter" Brittingham to make people use his crappy suppressor mounts or something?
Link Posted: 3/5/2024 6:48:12 PM EDT
[#1]
I'd expect he had a say, it is his project.
Link Posted: 3/6/2024 2:24:35 AM EDT
[#2]
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Originally Posted By s4s4u:
I'd expect he had a say, it is his project.
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Yeah, but the question is why was that thread size chosen...
Link Posted: 3/6/2024 11:17:16 AM EDT
[#3]
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Originally Posted By Longranger44:

Yeah, but the question is why was that thread size chosen...
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Ask them?  I don't know how anyone outside the project would have an answer.
Link Posted: 3/7/2024 6:28:49 PM EDT
[#4]
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Originally Posted By s4s4u:


Ask them?  I don't know how anyone outside the project would have an answer.
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No response from faxon
Link Posted: 3/15/2024 11:31:32 AM EDT
[#5]
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Originally Posted By s4s4u:


Ask them?  I don't know how anyone outside the project would have an answer.
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Finally heard back from faxon -
"Thank you for contacting us. The thread pitch chosen for the 8.6BLK was part of the design request with Q. It was a compatible thread pitch with some of the original offerings of suppressors and muzzle devices available for the 8.6BLK."

So just like I thought, proprietary bs from Brittingham just for the sake of making sure people buy muzzle devices from him. Looks like a good candidate for this adapter.

https://www.silencercentral.com/products/thread-adapter-m18x1-5-rh-to-5-8x24/
Link Posted: 3/15/2024 11:42:05 AM EDT
[#6]
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Originally Posted By Longranger44:

Finally heard back from faxon -
"Thank you for contacting us. The thread pitch chosen for the 8.6BLK was part of the design request with Q. It was a compatible thread pitch with some of the original offerings of suppressors and muzzle devices available for the 8.6BLK."

So just like I thought, proprietary bs from Brittingham just for the sake of making sure people buy muzzle devices from him. Looks like a good candidate for this adapter.

https://www.silencercentral.com/products/thread-adapter-m18x1-5-rh-to-5-8x24/
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I kinda figured as much.  Wondering if there is enough tenon thickness to just have it rethreaded
Link Posted: 3/15/2024 1:34:45 PM EDT
[#7]
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Originally Posted By s4s4u:


I kinda figured as much.  Wondering if there is enough tenon thickness to just have it rethreaded
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A Google search says the minor diameter of M18x1.5 is .645" so it would seem that it could be rethreaded in 5/8x24 no problem
Link Posted: 3/15/2024 3:29:06 PM EDT
[#8]
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Originally Posted By Longranger44:

A Google search says the minor diameter of M18x1.5 is .645" so it would seem that it could be rethreaded in 5/8x24 no problem
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A very common treading as well.  I'd go that way over an adaptor, wouldn't cost a whole lot more.
Link Posted: 3/15/2024 3:52:51 PM EDT
[#9]
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Originally Posted By s4s4u:


A very common treading as well.  I'd go that way over an adaptor, wouldn't cost a whole lot more.
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Yeah I'll have to call my gunsmith and see what he'd charge
Link Posted: 3/15/2024 4:24:25 PM EDT
[#10]
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Originally Posted By Longranger44:

Yeah I'll have to call my gunsmith and see what he'd charge
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I see $50 gets thrown around a lot on here.  Added benefit is you will know the threads are concentric to the bore.
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