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Thread: Barrel nut question

  1. #21
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    Quote Originally Posted by SA80Dan View Post
    I agree with the others, a receiver block is better.

    However.....securing the barrel will work as it is even the described method in the army technical manual. I think you'd have to be unlucky to shear the pin - but I'd still advocate a receiver block.

    THIS will work. This is the way I've done them since my first build/assembly in the late 80's. The military manual was all I had. The later builds have all been pre-assembled uppers. Although I do now own a receiver block, I have never used it. I agree the receiver block is probably the BEST way to go but the old school method in the mil manual will work fine. Also someone mentioned aluminum scuff marks on the barrel when you're done--take some steel wool and WD40 to it--20 seconds and you're done.

  2. #22
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    Quote Originally Posted by mtrmn View Post
    Also someone mentioned aluminum scuff marks on the barrel when you're done--take some steel wool and WD40 to it--20 seconds and you're done.
    Or just wrap the barrel in a bit of leather or rubber inner tube when clamping it in the blocks and not create the scuffs to begin with.

  3. #23
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    Quote Originally Posted by Tweak View Post
    oddly enough, it wasn't that long ago that barrel blocks were the only option.
    + 1 Used them for many years before they came out with the "clamshells" for the receiver. I used rosin and a thin sheet of lead to wrap the barrel and prevent slipping. It was also easier to clean up afterward.

    Now the clamshells do not work on all recievers because the manufacturers have changed their outside dimensions. On the "odd shaped" receivers, I use a AR-15/M16 BARREL EXTENSION TORQUE TOOL from Brownells.

    Brownells also has barrel vise jaws that are lined with polyurethane elastomer in order to grip tight and prevent marring. (I know the OP already owns his vise jaws and is not looking to buy a new set)

  4. #24
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    I did one with the barrel blocks only, way back when - and did not have any issues. But I think it timed to the gas block hole without a lot of force. Might make a difference.

    I use a receiver block now.

  5. #25
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    Quote Originally Posted by az doug View Post
    Brownells also has barrel vise jaws that are lined with polyurethane elastomer in order to grip tight and prevent marring. (I know the OP already owns his vise jaws and is not looking to buy a new set)
    These new lined barrel blocks will not clamp onto a light-weight barrel. Even the small groove side is too large. The old all-aluminum version works though.

  6. #26
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    Thanks, never tried the new blocks.

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