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AR15.COM
AR Sponsor
8/18/2009 9:58:26 AM EDT
Does RRA and Bushmaster use mil spec stock tubes or commercial on their 6 pos CAR stocks ?  Someone please explain the difference.  If you can provide demensions that would be great. Thanks
8/18/2009 11:52:10 AM EDT
[#1]
Here's a simple explanation of the diameter, Mil will be straight at the back and Commercial will have a slant, top to bottom.

http://www.magpul.com/pdfs/technotes/ctr/buffertubeid.pdf

I have an appointment or I'd give you more info,
Gotta Go,
SpecOps-13
8/18/2009 3:24:56 PM EDT
[#2]
RRA and Bushmaster both use commercial.  The only mil-spec ones are typically Colt, LMT, Stag, Bravo Company, VLTOR, and a few others.  Pretty much everyone who sells complete ARs in the buttons/banners above that I didn't list (site sponsors) uses commercial-spec.
AR Sponsor