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Thread: DD Lite Rail, torque specs?

  1. #1
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    DD Lite Rail, torque specs?

    Is there any particular torque spec for the bolts that clamp the rail to the barrel nut? and is there supposed to be any gap between the two halves of the clamp where the bolts go through, or are the two halves supposed to be touching each other?

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    Did your rail not come with a manual? I tried doing a search for a PDF file but it didnt turn up anything.
    My RIS II manual indicates 29-32in/lbs, though. You could probably go by that.

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    It came as a complete upper. So no manual, and DD doesn't have any available for download on their website.

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    My instruction sheet calls for 50 foot-pounds.

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    THis should answer all your questions.

    http://www.lmgtfy.com/?q=DD+Lite+Rail+installation



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    Quote Originally Posted by jayfl View Post
    My instruction sheet calls for 50 foot-pounds.
    50 ft-lbs is the torque on the barrel nut to secure the barrel to the receiver. The torque spec on the hex-head set screws that secure the rail to the barrel nut collar is 30 inch-lbs.

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    Quote Originally Posted by Iraqgunz View Post
    THis should answer all your questions.

    http://www.lmgtfy.com/?q=DD+Lite+Rail+installation
    .....
    Last edited by An Undocumented Worker; 09-04-11 at 12:02.

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    Quote Originally Posted by An Undocumented Worker View Post
    All the usual suspects, on that search do not specifically answer the questions I posed.
    Ok from the DD TM-RIS II, Model RIS II M4A1 FSP, NSN 1005-01-566-5280, REV B, issued 16 FEB 2010... section 2.3.12: "Torque all six (6) Bolt Up Screws to 29-32 in/lbs. Torque center screws first, torque upper screws second, and torque lower screws third."

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    Quote Originally Posted by amd5007 View Post
    Ok from the DD TM-RIS II, Model RIS II M4A1 FSP, NSN 1005-01-566-5280, REV B, issued 16 FEB 2010... section 2.3.12: "Torque all six (6) Bolt Up Screws to 29-32 in/lbs. Torque center screws first, torque upper screws second, and torque lower screws third."
    Thankyou, that provided more usefull info than the weapon evolution install guide.

  10. #10
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    Quote Originally Posted by Hmac View Post
    50 ft-lbs is the torque on the barrel nut to secure the barrel to the receiver. The torque spec on the hex-head set screws that secure the rail to the barrel nut collar is 30 inch-lbs.
    Yeah, I spaced on that one.

    I don't think the instruction sheet even mentions the bolt torque other than the usual "hand tighten" bit.

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