Ar 15: Mil spec vs commercial

jtolbert said
Different tube size...MAG400 (military) == 1.14", MAG401 (commercial) == 1.17".

http://www.ar15pro.net/2008/09/milspec-buffer-tubes-vs-commercial.html explains the difference in the tubes a bit more clearly.
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thanks... guess i wont know till i get in there!

TheTecher said
Anything that's mil spec is some part the meets the military's specifications. I'm building an ar, I like magpuls acs-l stock.
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above is what i was looking for... but yes i know what mil spec means...