(AR15) mil spec buffer tube to commercial lower?

Discussion in 'Rifle Discussion' started by sowatnao, Oct 4, 2011.

  1. sowatnao

    sowatnao
    seattle
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    ok ok... so i got this DPMS lower right, and it has commercial buffer tube/stock. I was wondering if a mil spec buffer tube would fit onto my DPMS lower because i want to move onto the mil spec set up. I heard the difference between the two is 0.02". Is it going to be a real struggle screwing the mil spec tube into my lower receiver?

    :thumbup:
     
  2. Garg

    Garg
    east of portland metro
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  3. nubus

    nubus Guest

    All lowers are Milspec.
    Some come with commercial tubes.
     
  4. sowatnao

    sowatnao
    seattle
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    thank you! i feel so enlightened now!
     
  5. Garg

    Garg
    east of portland metro
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    I'm sorry, if you read through the thread, it basically says that the buffer tube spec, is irrelevant. You can use either spec. Comm, or mil. It further goes on to describe that there may be differences, but not necessarily any advantage. Low price mil spec, is not as good as high priced comm spec, for example. What ever spec you use, you are going to get what you paid for.

    To answer your question directly, yes, you can use a mill spec stock on your DPMS lower.

    Is that better?
     
  6. optiontrigger

    optiontrigger
    Snohomish County, WA
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    The main difference on which buffer tube is important to you is the what type of stock you want to install. Some manufacturers only make Mil-spec stocks. I believe the LMT SOPMOD is one example.
     
  7. sowatnao

    sowatnao
    seattle
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    yip answered my question. I didnt know if my lower can accept a mil spec buffer tube. But from the infos given, all lowers are able to accept both comm and mil spec tube.
     
  8. DoubleTapDrew

    DoubleTapDrew
    Oregon
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    Yes, it'll fit. And I'd go with a mil-spec buffer tube. It'll give you a wider range of stocks to choose from.
    Watch out for the rear takedown detent spring that'll pop out when you unscrew the tube
     
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  9. Eric911

    Eric911
    WA
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  10. PDXSparky

    PDXSparky
    Keizer / Hillsboro
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    My spring can't pop out. I tapped the hole for a 4/40 set screw, cut off the length of the set screw from the spring, inserted the detent & spring, and screwed in the set screw. Got the idea from this lower building guide
     
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  11. curtisfranklin

    curtisfranklin
    kentucky
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    I have a windham and it has commercial buffer tube on it, and I want to put a mill spec buffer tube on it. so do I have to buy a new spring and guts for my mill spec or can I use the spring from my commercial?
     
  12. SIG34

    SIG34
    Lynnwood WA
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    The spring and buffer are the exact same just the tubes are different. “Barely”

    Honestly might not be worth it..

    33DD2A0A-EF87-4600-837A-725641613D70.jpeg
     
  13. curtisfranklin

    curtisfranklin
    kentucky
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    It looks as if it would not tread into my windham because the OD of the tube is different in your example above.
     
  14. Kruejl

    Kruejl
    Hillsboro
    Moderator of the Coriolis effect Staff Member Gold Supporter

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    Com-spec tubes are a thing of the past. It will thread, trust me. Swap it out and enjoy!
     
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  15. curtisfranklin

    curtisfranklin
    kentucky
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    ok thank you for the reply
     
  16. cookie

    cookie
    Idaho.
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    Milspec is also material 7075 is twice as strong as 6061 alloy.
     
  17. Kruejl

    Kruejl
    Hillsboro
    Moderator of the Coriolis effect Staff Member Gold Supporter

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    Com-spec is cheaper to manufacture. Bushmaster and Olympic used them for a while. That's. Pretty. Much. It.
     

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