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Thread: Torquing Old Barrel to New Upper Receiver

  1. #11
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    Those crazy Canukians!

    The upper is aluminum and anodized and has a large diameter thread. To get the threads to seat to each other correctly, torque it three times using some kind of assembly lube. Otherwise, there may be tight spots and loose spots. Evenly loaded threads will keep from loosening up better and won't need so much torque.

    Blessed mother of all kittens. Torquing the barrel nut is very simple, yet people make it more complicated than landing a rover on Mars.

    Rather amusing, actually
    Last edited by MistWolf; 12-03-12 at 00:29.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  2. #12
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    I don't see this as a huge issue one way or another. The torque range is pretty wide anyway. I torque 3 times no matter what.
    "You people have too much time on your hands." - scottryan

  3. #13
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    Quote Originally Posted by Robb Jensen View Post
    Whenever I'm using a new receiver I torque 3 times. Only once if the receiver is used.
    On new receivers, I have switched from 3 to somewhere around 8/9.

    On used receivers, do you think the threads have stretched?



    C4

  4. #14
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    Quote Originally Posted by C4IGrant View Post
    On new receivers, I have switched from 3 to somewhere around 8/9.

    On used receivers, do you think the threads have stretched?



    C4
    I sometimes exceed 3 times, but 3 times minimum. Example with LaRue and Noveske NSR bbl nuts it takes a lot to get them to where I need them for alignment. I grease them up well. Torque. Loosen. Torque a little higher. Loosen. Etc until I get good alignment and sufficient torque.

    I don't know if the used receivers threads have stretched. Just something LtCol Lutz taught me a long time ago.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  5. #15
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    Now I have to start giving it 10 torques just to ONE UP Grant.
    "You people have too much time on your hands." - scottryan

  6. #16
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    Quote Originally Posted by Robb Jensen View Post
    I sometimes exceed 3 times, but 3 times minimum. Example with LaRue and Noveske NSR bbl nuts it takes a lot to get them to where I need them for alignment. I grease them up well. Torque. Loosen. Torque a little higher. Loosen. Etc until I get good alignment and sufficient torque.

    I don't know if the used receivers threads have stretched. Just something LtCol Lutz taught me a long time ago.
    Right on the LT, Noveske, WC, etc to line up.


    Interesting. I don't mess with too many used receivers, but will take a closer look next time.



    C4

  7. #17
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    Oh wait!

    My reply to you Robb was way too professional. I need to be more married to my opinion (or how I do things) and throw a fit, call you names and basically flip out over this impugning.



    C4
    Last edited by C4IGrant; 12-03-12 at 09:36.

  8. #18
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    Quote Originally Posted by C4IGrant View Post
    My reply to you Robb was way too professional. I need to be more married to my opinion (or how I do things) and throw a fit, call you names and basically flip out over this impugning.
    Agreed.
    "You people have too much time on your hands." - scottryan

  9. #19
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    Cool

    The way I've been told:

    New receiver & new barrel nut = torque minimum 3 times

    Used receiver & used barrel nut (that have been used on each other already) = torque once (although I usually do 2-3 anyway)

    Not sure why you would want to use a used bbl nut on a new upper receiver, but I'd imagine you want to go a minimum of 3 as if it were new.

    How can you tell if the threads have stretched?



    ETA: Why does the little smilie show up in the sub line when I didn't select it??
    Last edited by Ironman8; 12-03-12 at 09:57.

  10. #20
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    Quote Originally Posted by C4IGrant View Post
    My reply to you Robb was way too professional. I need to be more married to my opinion (or how I do things) and throw a fit, call you names and basically flip out over this impugning.



    C4
    You are correct, a right proper hissy fit, followed by a excoriating disparagement of his character, would let others know how seriously they need to consider the facts. A polite response is for those unsure of their own opinion. I, for one, would not want to lose respect for the depth of your experience and knowledge. Perhaps you should go back and edit your post, or follow it up with a scathing reply as to maintain your online rep as an internet expert.

    Thank you
    Last edited by MistWolf; 12-03-12 at 10:47.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

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