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Posted: 9/14/2016 8:20:54 PM EDT
[#1]
I've seen commercial diameter tubes with a flat end, but never a mil-spec diameter with a angled ends.
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Posted: 9/14/2016 9:47:22 PM EDT
[#2]
This should answer your question and some: https://www.ar15.com/archive/topic.html?b=3&f=12&t=620877
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Posted: 9/14/2016 10:55:11 PM EDT
[#3]
That kinda seemed like two guys who knew exactly the same stuff, arguing over the same stuff.
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Posted: 9/14/2016 11:59:36 PM EDT
[#4]
Quote HistoryQuoted:
That kinda seemed like two guys who knew exactly the same stuff, arguing over the same stuff. Bascially, "commercial spec" is just a catch-all for "non mil-spec". Commercial tubes are not guaranteed to interchange with other commercial tubes or stock bodies. Commercial tubes in "mil-spec diameter" will not meet mil-spec, but will mount mil-spec sized stock bodies. There is in fact only one spec - mil-spec, and the rest are commercial, made of cheaper materials, using cheaper manufacturing processes, and not guaranteed to interchange with each other. |
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Posted: 9/16/2016 2:08:53 PM EDT
[#5]
Quote HistoryQuoted:
I've seen commercial diameter tubes with a flat end, but never a mil-spec diameter with a angled ends. Double Star makes a mil spec with an angled end. Does not work with stocks that have a closed end on them. |
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Posted: 9/16/2016 9:38:39 PM EDT
[#6]
"mil spec" specifies dimensions and finishes. Literal milspec is specifications by the government of materials, dimensions, and finishes to ensure uniformity in guns, and interchangability of parts. For the M4 buffer tube, it also is specified as 4 positions ( see picture).
The colloquial term "milspec" refers primarily to the internal diameter of the tube, and the external diameter of the tube threads. I have a "milspec" buffer tube that has 6 positions and not 4. I've also seen "milspec" dimensional tubes that have the slant. 
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Posted: 9/17/2016 11:02:12 AM EDT
[#7]
So even with the thread differences, they will both fit on mil spec lowers, correct?
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Posted: 9/17/2016 1:55:52 PM EDT
[#8]
Quote HistoryQuoted:
So even with the thread differences, they will both fit on mil spec lowers, correct? The only difference in the threads is the way they are made, they are both the same size and will both fit the lowers. |
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Posted: 9/17/2016 1:59:07 PM EDT
[#9]
Why did anyone bother making commercial spec tubed in the first place?
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Posted: 9/17/2016 3:03:48 PM EDT
[#10]
Quote HistoryQuoted:
Why did anyone bother making commercial spec tubed in the first place? There is a market for it and it's one of many ways to keep the cost down. Some AR owners are not educated on the differences between commercial and "mil-spec". To some, all parts are created equal. |
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Posted: 9/17/2016 3:09:06 PM EDT
[#11]
Quote HistoryQuoted:
Why did anyone bother making commercial spec tubed in the first place? Cheaper to make. As I understand it, the commercial tubes have a larger diameter to allow cutting the threads, while mil-specs have rolled threads. |
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Posted: 9/17/2016 4:37:52 PM EDT
[#12]
Quote HistoryQuoted:
Cheaper to make. As I understand it, the commercial tubes have a larger diameter to allow cutting the threads, while mil-specs have rolled threads. Quote HistoryQuoted:
Quoted:
Why did anyone bother making commercial spec tubed in the first place? Cheaper to make. As I understand it, the commercial tubes have a larger diameter to allow cutting the threads, while mil-specs have rolled threads. Also there was no concern about interchangeability between manufacturers like there is today. |
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Posted: 9/17/2016 4:58:17 PM EDT
[#13]
Quote HistoryQuoted:
Why did anyone bother making commercial spec tubed in the first place? There was a time in history, where you could not buy mil spec stuff for the public. |
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Posted: 9/21/2016 12:06:28 PM EDT
[#14]
Quote HistoryQuoted:
Why did anyone bother making commercial spec tubed in the first place? In addition to what others have said, there was a time when the TDP (technical design package) was exclusively held by a few companies, and other companies wanting to get in the market performed their share of reverse engineering and developing parts that were only in spec with their own processes. |
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Posted: 9/21/2016 12:10:41 PM EDT
[#15]
Quote HistoryQuoted:
In addition to what others have said, there was a time when the TDP (technical design package) was exclusively held by a few companies, and other companies wanting to get in the market performed their share of reverse engineering and developing parts that were only in spec with their own processes. Quote HistoryQuoted:
Quoted:
Why did anyone bother making commercial spec tubed in the first place? In addition to what others have said, there was a time when the TDP (technical design package) was exclusively held by a few companies, and other companies wanting to get in the market performed their share of reverse engineering and developing parts that were only in spec with their own processes. The TDP is still not available, everything has basically been reverse engineered. |
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Posted: 9/21/2016 1:46:47 PM EDT
[#16]
There was also a time when it wasn't even leaked!
The pioneers of what becomes the commercial spec were working from photos of issue weapons at first. |
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Posted: 9/26/2016 11:20:51 PM EDT
[#17]
Does anyone know where I could get the actual Mil-Spec for the buffers ? Leaked Colt TDP ? There are a lot of vendors claiming they are selling true mil-spec tubes from original the supplier for the Mil. But when you talk to them their tube threads are cut not rolled, tubes not extruded and 6 holes not 4. Some cases not even advertised as 7075 T-6. The only thing that is close to Mil Spec is the tube diameter.
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Posted: 9/27/2016 9:16:51 AM EDT
[#18]
Quote HistoryQuoted:
Does anyone know where I could get the actual Mil-Spec for the buffers ? Leaked Colt TDP ? There are a lot of vendors claiming they are selling true mil-spec tubes from original the supplier for the Mil. But when you talk to them their tube threads are cut not rolled, tubes not extruded and 6 holes not 4. Some cases not even advertised as 7075 T-6. The only thing that is close to Mil Spec is the tube diameter. Why not just buy a Colt tube? |
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Posted: 9/27/2016 9:28:24 AM EDT
[#19]
Quote HistoryQuoted:
Why not just buy a Colt tube? Quote HistoryQuoted:
Quoted:
Does anyone know where I could get the actual Mil-Spec for the buffers ? Leaked Colt TDP ? There are a lot of vendors claiming they are selling true mil-spec tubes from original the supplier for the Mil. But when you talk to them their tube threads are cut not rolled, tubes not extruded and 6 holes not 4. Some cases not even advertised as 7075 T-6. The only thing that is close to Mil Spec is the tube diameter. Why not just buy a Colt tube? This |
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