Magpul butt stock question

Discussion in 'AR-15 Discussion' started by doose, Feb 4, 2011.

  1. doose

    doose New Member

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    Hello,
    I am thinking about buying a Magpul MOE butt stock for my RRA ET. However, I have to choose between the Mil-spec receiver extension tube and the commercial receiver extension tube. Well, how does one tell if they have a mil-spec or commercial tube?? Any markings?? Are the dimensions different??? Thank you for your help.
     
  2. Ubergopher

    Ubergopher New Member

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    If you've got a RRA lower it should be a commercial tube. That's what mine was.
     

  3. cddbrowns

    cddbrowns New Member

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    Mil-Spec diameter is 1.148" and Commercial diameter is 1.168" Commercial has a 5 degree slant back too, the Mil-Spec does not.
     
  4. Gatekeeper

    Gatekeeper New Member

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    The squared off or angled end of the tube is the easiest ID.
    From Magpul Website
     

    Attached Files:

    Last edited: Feb 4, 2011
  5. mjkeat

    mjkeat New Member

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    The mil-spec is made of a more durable material w/ a higher tensil? strength. It can stand up to a higher amount of force before it snaps in half. I think its 75 pounds. Im going off of memory so my #s may be off.
     
  6. doose

    doose New Member

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    All,
    yep. I have the info I need and a new Magpul MOE is on the way. thanks again.
     
  7. cddbrowns

    cddbrowns New Member

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    Ooops, not diameter, but width....sorry.