HighVelocity Posted January 28, 2009 Share Posted January 28, 2009 How do I know if my AR (with collapsible stock) has a commercial or Mil-spec buffer tube? I want to get a MagPul CTR stock but want to make sure I order the right one. Thanks Link to comment Share on other sites More sharing options...
fastshooter03 Posted January 28, 2009 Share Posted January 28, 2009 IFFFFFF I remember right the Mil-spec tube is 1.170" and the commercial tube is 1.190". You might want to double check in brownells or on AR15.com Nick Link to comment Share on other sites More sharing options...
Derek45 Posted January 29, 2009 Share Posted January 29, 2009 (edited) Mil-spec is 1.14" Commercial is 1.17" http://www.magpul.com/pdfs/technotes/ctr/buffertubeid.pdf COLT, STAG are mil spec Bushmaster, RRA, DMPS, and most others are commercial. Edited January 29, 2009 by Derek45 Link to comment Share on other sites More sharing options...
HighVelocity Posted January 29, 2009 Author Share Posted January 29, 2009 (edited) Thanks guys. That's the info I needed. edit: Sweet! just noticed this was post 556. Edited January 29, 2009 by HighVelocity Link to comment Share on other sites More sharing options...
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