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Thread: Gas block to barrel fitment

  1. #1
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    Gas block to barrel fitment

    I finally decided to test fit some pieces together and noticed that my (set screw) Vltor .625 gas block slipped rather easily onto my DD LW barrel, way too easily. Now if I remember correctly, my other Vltor/DD setup had some resistance going down. I don't have a mic so I can't give you the exact dimensions.
    Will this affect a good gas seal?

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    It's possible, depending on how sloppy the fit is. However, the set screws at the bottom will pull the gas block down & help with sealing
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    Quote Originally Posted by MistWolf View Post
    It's possible, depending on how sloppy the fit is. However, the set screws at the bottom will pull the gas block down & help with sealing
    There isn't any noticeable wiggle that I can detect with my bare hands so it might be good to go. I was concerned because the block slips on easily and I can spin it around with my finger with no effort at all.

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    RTV sealant. available at your local auto parts supplier.

    if its the set screw variety, i wouldnt worry about it unless you have a problem once properly assembled. as misty said, it'll tighten up a lot once you tighten it down.

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    Thanks guys. I'll advise once everything gets assembled and I give her a run.

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    Depending on your application for the rifle,

    Rocksett might also be an option. Used by KAC and ACC

    http://www.amazon.com/Flexbar-Rockse.../dp/B001C1D800

  7. #7
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    If you use some kind of sealant, be very careful to keep it out of the gas port of the barrel & block
    The number of folks on my Full Of Shit list grows everyday

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  8. #8
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    Quote Originally Posted by MistWolf View Post
    If you use some kind of sealant, be very careful to keep it out of the gas port of the barrel & block
    yea.. and to state the obvious (hopefully), i was kidding about the RTV sealant. i wouldn't use a sealant- just make sure you place it correctly, and tighten it down good. it WILL leak at first, but then any little cracks will quickly fill up with carbon and self-seal.

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    Quote Originally Posted by bkb0000 View Post
    yea..i was kidding about the RTV sealant...
    WHEW! Thanks for clearing that up, I was a bit worried there! Since you have greater experience with ARs than I do, I was a bit reluctant to challenge the use of RTV. Thought maybe you knew something or had some trick I didn't
    Last edited by MistWolf; 03-27-11 at 20:51.
    The number of folks on my Full Of Shit list grows everyday

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