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Thread: BRT EzTune Gas Tubes

  1. #11
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    Quote Originally Posted by markm View Post
    So you could ream the ones you have out to get them just right?
    That could definitely work. Unfortunately I don't have bits/reamers in the correct sizes.

  2. #12
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    Quote Originally Posted by Clint View Post
    How is the fit of the tube in the gas block?

    That could be contributing to the under gassing.

    We've seen almost no evidence of bleeding out the top with a tight fitting gas block.

    In our limited testing, the required port sizes are a close match to those in the barrel.
    That might be the issue. Looking closer at the .0635 tube I pulled out, there is a lot of burnt carbon on the bottom around the port (past the area that should be exposed to the flame). And on the top the tube is actually pretty clean until just aft of the the end of the gas block.

  3. #13
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    Quote Originally Posted by Defaultmp3 View Post
    Would probably drive up the price quite a bit, but one could always make it out of Inconel if the gas erosion is that big a concern.

    Compared to the BRT custom tune gas port - HD "kit" at $49.95 it would seem like the BRT EZ tune gas tube would be another very simple and viable option, especially for rifles with pinned muzzle devices. *If* one would need more erosion resistance, inconel would be the material of choice.

    V7 Weapon Systems have inconel gas tubes, but they do not offer any with smaller custom sized ports,yet.

    https://www.vsevenweaponsystems.com/...ment-gas-tube/
    Last edited by Biggy; 06-23-18 at 16:35.

  4. #14
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    A $70 gas tube? Hilarious.

  5. #15
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    The gasses slow to the speed of sound as they pass through the gas port in the barrel. It is also a small fraction of the gas the gas port is exposed to. So, the gas tube is getting less gas at a greatly reduced velocity and gas cutting of the gas tube is minimized.

    New AR builds often need a few rounds to get the carbon to seal the fit between the gas block and the gas tube. It's also possible that the exit of the gas block is too large. I would hold of on any reaming for now.
    The number of folks on my Full Of Shit list grows everyday

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  6. #16
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    Quote Originally Posted by Clint View Post
    How is the fit of the tube in the gas block?

    That could be contributing to the under gassing.

    We've seen almost no evidence of bleeding out the top with a tight fitting gas block.

    In our limited testing, the required port sizes are a close match to those in the barrel.

    Idk... maybe it's undergassed because there's a goddamn hole opposite of the actual port hole!
    I mean seriously... wtf is this shit...?

  7. #17
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    I just received my order and I was also surprised about the opposing hole.
    But since I haven't tried it out yet I have to believe the BRT design team. I doubt they wouldn't have tested it prior to releasing it. BRT does state the tube is a "PROTOTYPE" in its description.
    Fingers crossed that it performs as expected.
    Quote Originally Posted by DirtDiver06 View Post
    Idk... maybe it's undergassed because there's a goddamn hole opposite of the actual port hole!
    I mean seriously... wtf is this shit...?
    Sent from my Pixel 2 XL using Tapatalk

  8. #18
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    This is how all the prototype tubes are done and tested.

    Nothing to worry about with a quality gas block.
    Last edited by Clint; 08-19-18 at 18:32.
    Black River Tactical
    BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
    BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
    BRT Bolt Carrier Groups M4A1, M16 CHROME
    BRT Covert Comps 5.56, 6X, 7.62

  9. #19
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    Thank you for the explanation. I knew you were in this thread somewhere and was hoping you would comment.
    Can't wait to see if it improves my overgassed build.
    Quote Originally Posted by Clint View Post
    This is how all the prototype tubes are done and tested.

    Nothing to worry about with a quality gas block.
    Sent from my Pixel 2 XL using Tapatalk

  10. #20
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    Quote Originally Posted by Clint View Post
    This is how all the prototype tubes are done and tested.

    Nothing to worry about with a quality gas block.
    I'm using Noveske and Vltor blocks, hope that's quality enough.
    Last edited by DirtDiver06; 08-19-18 at 23:08.

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