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Old 02-04-2011, 05:09 PM   #1
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Default Magpul butt stock question

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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.

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Old 02-04-2011, 05:18 PM   #2
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If you've got a RRA lower it should be a commercial tube. That's what mine was.

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Old 02-04-2011, 09:44 PM   #3
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Quote:
Originally Posted by doose View Post
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.
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.
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Old 02-04-2011, 10:08 PM   #4
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The squared off or angled end of the tube is the easiest ID.
From Magpul Website

milspec_vs_commercial-extension.jpg  
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Old 02-04-2011, 11:32 PM   #5
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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.

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Old 02-05-2011, 12:02 AM   #6
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All,
yep. I have the info I need and a new Magpul MOE is on the way. thanks again.

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Old 02-05-2011, 07:08 PM   #7
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Quote:
Originally Posted by cddbrowns View Post
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.
Ooops, not diameter, but width....sorry.
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