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FL_flyfishing_guide
Tactical Gravy Legs
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Posted: 5/29/2009 12:59:07 AM
I know they are a different diameter, but do both the Mil-Spec and Commercial buffer tube extensions fit into a standard (any) lower receiver?
"You'll spend the other 165 days of the year sleeping on the couch with your crank in hand, wondering WTF happened" - Thank you Southeast_Scrounger
SSeric02
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Posted: 5/29/2009 1:11:36 AM
Yes, they both have the same thread pitch/diameter to go into a lower receiver. Some of the commercial versions have a funky slanted end to match up with the angle of the stock's buttplate.
Ironmaker
I make both 4140 and 4150.
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Posted: 5/29/2009 1:30:56 AM
Never follow anyone shorter than you; they can walk under things that you can't.
FL_flyfishing_guide
Tactical Gravy Legs
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Posted: 5/29/2009 2:03:14 AM
I like the chart, but will a Mil-Spec tube screw into any lower (specifically a Stag lower)?
"You'll spend the other 165 days of the year sleeping on the couch with your crank in hand, wondering WTF happened" - Thank you Southeast_Scrounger
gixer6
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Posted: 5/29/2009 2:06:38 AM
Originally Posted By FL_flyfishing_guide:
I like the chart, but will a Mil-Spec tube screw into any lower (specifically a Stag lower)?


yes. stags come with mil spec tubes from the factory. but even if they didnt, youd still be able to use one.
nicholsmf
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Posted: 5/29/2009 6:28:04 AM
Originally Posted By FL_flyfishing_guide:
I like the chart, but will a Mil-Spec tube screw into any lower (specifically a Stag lower)?


yes
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Pacodutaco
Got Taco?
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Posted: 5/29/2009 7:20:04 AM
Mil-spec tube will screw in to any lower. The main difference is the diameter of the tube after the threads. Commercial tubes are a bit bigger as the above pic shows and the end of the tube us has an angled end instead of a flat end like on a mil-spec tube.
KCabbage
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Posted: 5/29/2009 7:53:15 AM
I was wondering the same thing. Great picture Ironmaker!
Eric802
It's not the years, it's the miles...
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Posted: 5/29/2009 10:01:16 AM
Just FYI, not all commercial tubes have the slanted end. Most do, but not all. The diameter of the tube is the key factor, not whether the end is slanted.
"You underestimate my ability to handle the Cock." - BUCC_Guy
559andyboy
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Posted: 5/29/2009 5:28:03 PM
what about a rra tube??
nicholsmf
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Posted: 5/29/2009 5:31:43 PM
Originally Posted By 559andyboy:
what about a rra tube??


commercial
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559andyboy
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Posted: 5/29/2009 5:52:16 PM
where can i get a nice mil spec tube??
nicholsmf
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Posted: 5/29/2009 6:14:34 PM
[Last Edit: 5/29/2009 6:16:33 PM by nicholsmf]
Originally Posted By 559andyboy:
where can i get a nice mil spec tube??


http://www.bravocompanyusa.com/Stock-Hardware-Mounting-Kit-Mil-Spec-p/stock%20hardware%20kit.htm

or

http://www.pkfirearms.com/content/1/20/12/32

FYI, there are little boxes at the top of the page that link to industry partner sites. If you click them you can see what they sell
Everybody needs something to believe in. I believe I will have another beer.
CWDraco
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Posted: 5/29/2009 9:19:12 PM
[Last Edit: 5/29/2009 9:31:43 PM by CWDraco]
I don't know where you guys got your information from, but you need to check your sources again....

Commercial tubes DO NOT have the same threading as Mil-spec. The thread count and pitch are the same, but the depth and height of the threads is different. This is why a commercial tube will wiggle in the lower until it is tightened by the nut.

On a mil-spec tube the threads are 100% exact.

Now they could have fixed that fuck up since I last bought a commercial tube, but that is why they were cheaper and I think its still the reason they are cheaper.

pay close attention to WHY the tubes are different sizes.....

commercial....http://magpul.com/pdfs/buffertube-civilian-M4.pdf

Mil-spec.....http://magpul.com/pdfs/buffertube-civilian-M4.pdf