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6/21/2017 8:25:40 PM
Posted: 5/28/2009 8:59:07 PM EDT
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?
Link Posted: 5/28/2009 9:11:36 PM EDT
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.
Link Posted: 5/28/2009 9:30:56 PM EDT
Link Posted: 5/28/2009 10:03:14 PM EDT
I like the chart, but will a Mil-Spec tube screw into any lower (specifically a Stag lower)?
Link Posted: 5/28/2009 10:06:38 PM EDT
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.
Link Posted: 5/29/2009 2:28:04 AM EDT
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
Link Posted: 5/29/2009 3:20:04 AM EDT
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.
Link Posted: 5/29/2009 3:53:15 AM EDT
I was wondering the same thing. Great picture Ironmaker!
Link Posted: 5/29/2009 6:01:16 AM EDT
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.
Link Posted: 5/29/2009 1:28:03 PM EDT
what about a rra tube??
Link Posted: 5/29/2009 1:31:43 PM EDT
Originally Posted By 559andyboy:
what about a rra tube??


commercial
Link Posted: 5/29/2009 1:52:16 PM EDT
where can i get a nice mil spec tube??
Link Posted: 5/29/2009 2:14:34 PM EDT
[Last Edit: 5/29/2009 2:16:33 PM EDT 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
Link Posted: 5/29/2009 5:19:12 PM EDT
[Last Edit: 5/29/2009 5:31:43 PM EDT 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
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