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Thread: Anti-Seize on Receiver Extension

  1. #21
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    interesting. i've never actually done it- i don't TW castle nuts either. but i remembered the difference from the -23, so that's what i relayed. i can also remember at least a couple debates being lost and won on this very topic by referring to the -23.

  2. #22
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    *ARMY TM 9-1005-319-23&P NOVEMBER 2008

    *Supersedes TM 9-1005-319-23&P, 11W3-5-5-42, and SW370-BU-MMI-010. 01 May 1991, including all changes.

    13. Using spanner wrench and torque wrench, torque round plain nut (9) to 38 to 42 ft-lb (51.53 to 56.95
    N-m).
    My fear is that ahh, the whole island will ahh, become so overly populated, that it will tip over and ahh, and capsize...
    Hank Johnson (D) GA YouTube

  3. #23
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    Thanks for the 2008 update Luke. I only have the 1987 and revised 1991 versions of the military manual. Here is a link to this Nov 08' version. Page 256 of the reader or manual page 0025-8.

    http://generalcartridge.net/Document...23Pchange8.pdf

    These torque specs for the carbine castle nut are exactly what both my Colt manuals that date back to 2000' state. Ken Elmore is actually a bit touchy when it comes to that question as it gets asked often enough by those who used to go through his and the Colt course.

    You know the funny thing is that the Brownells build your own AR video has the guy setting the receiver extension tube without the use of a torque wrench. He states that it should be set at 40 +/- 2 inch pounds but manually torques the nut and CLEARLY goes far beyond 40 inch pounds. But the most ironic thing was that it didn't look like he put nearly enough torque on it that he should have. On the other hand in my AR/M4 build series I have been asked about not using a torque wrench and that it looks as if I go way beyond 40 inch pounds.

    Common sense is key but knowing actual torque variations even by the feel of your own calibrated hands is important. Confusing 40 inch pounds and 40 foot pounds by hand is very hard to do. Maybe this same confusion over torque values is the same reason why so many guys feel they need loctite on their castle nut. They just aren't putting enough torque on the damn thing. That and not staking it.

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