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11/25/2009 5:21:50 PM EDT
Can you guys tell me which lower has the MilSpec and which has the Comm. buffer tube ?

The one that is slightly larger is which ? I think it might have a slanted end as well, as opposed to flat.


 Thanks guys
11/25/2009 5:25:19 PM EDT
[#1]
Which lower?  I didn't understand that question but.....

Mil-Spec tubes are smaller in diameter than commercial tubes.  Stay with Mil-Spec, it gives you more options.

BTW-Commercial tubes tend to have a slant at the back where as Mil-Spec usually don't.  This is a generalization only.  I've heard of mil-spec tubes with slant rears and vice versa.
11/25/2009 5:29:37 PM EDT
[#2]
Mil Spec tube are 1.4" and commercial tubes are 1.7", and the slant at the rear is kinda iffy but all Mil Spec tubes I have are straight on the end and the one commercial tube on a spare lower is slanted.
11/25/2009 5:39:10 PM EDT
[#3]
Any lower will take either tube, its only the diameter of the tube that differs.
11/25/2009 6:21:48 PM EDT
[#4]
Sorry for the sloppy wording.

I have two lowers, one I built and one I bought complete. Being kinda new to the building aspect didn't relize there was two different buffer tubes out there. After building my first lower came across a deal on a second lower already built ( no stock ) and bought it . Once I had both lowers in hand I quickly relized there was a difference in the buffer tubes. One buffer was slightly larger w/ a angled end and the other was slightly smaller with a flat end.

I am about to order some parts for both, including stocks, and want make sure I know which is which before I order.

Thanks for the replys from the new guy.
11/25/2009 7:06:29 PM EDT
[#5]
More specific info. from Magpul, a site sponsor, at this link: Buffer tube id
Off the top of my head, complete lowers from some manufacturers come with commercial size buffer tubes: Bushmaster, RRA are two examples. The thread sizes are the same on each type.
11/25/2009 8:16:23 PM EDT
[#6]
Thank you TigerForce, exactly what I wanted to know in that link.

Thanks to to the other replies as well, sorry my communication skills suck.

Happy ThanksGiving everybody.
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