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Thread: Gas-port regulating gas-block insert install and DIY manufacture.

  1. #71
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    That's kind've a loaded question, as there is no direct answer, there are other variables at play.
    Can a metered orifice above a slightly over sized port regulate gassing with the same size orifice as base barrel ported with that said orifice? I would say yes for most, but not all during a lifespan of that base barrel. There's a lot of variables involved, port distance from the chamber, erosion characteristics of the selected ammunition, etc..
    Can a metered orifice above a grossly over sized port regulate gassing with the same orifice size as a barrel ported with that said orifice? It can tend to, but there are additional negatives that tend to add more to reduce a lifespan of the barrel for many. You really want the base barrel porting to be as minimal as possible to regulate gas flow. Even with an additional orifice outside of the barrel, you create a portion of the barrel with an over sized port that allows erosive gasses to wear to a point of being the limiting factor in barrel life.
    We pretty much accept throat erosion for what it is overall, but combinations can kill the barrel for its requirements before that because of other things.
    It's not really all that hard to port the barrel close to proper requirements, at least for most combinations. Sure, some may not all have the same requirements, but porting for those really isn't all that difficult either for most.
    I can see gains with an external orifice to complement some uses to extend barrel life. In some situations, a proper base barrel port will not be complimented in extended barrel life with an external orifice. Either way, you only gain negatives with a larger than required based port.

  2. #72
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    Doesn't FN use this type of regulation in the SCAR platform?

    Sent from my SM-G930P using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

  3. #73
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    Yup
    .
    .
    Black River Tactical
    BRT OPTIMUM HFCL Barrels - Hammer Forged Chrome Lined 11.5", 12.5", 14.5"
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 12.5" MRC, 11.5" CQB, 9" PDW
    BRT EZTUNE Preset Gas Tubes - CAR and MID
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
    BRT MicroPin Gas Blocks - .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  4. #74
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    I recently bought and installed one of the Black Rifle custom gas ports to tame a slightly over gassed carbine.

    The included instructions were clear and simple and the installation was easy and straightforward. It probably took longer to pull the flash hider, gas tube and gas block than it did to complete the port install.

    I don't have a ton of rounds on this new setup yet but it seems to be working as advertised. The gun cycles a bit easier now.

    If you have a barrel that shoots good but has a large gas port or you're looking to tune a gun for suppressed use this seems to be a simple and solid option.

    Sent from my SM-G930P using Tapatalk
    Last edited by Tokarev; 06-16-17 at 15:47.
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

  5. #75
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    Yep, pretty cool and straightforward technology. It's ashamed that most barrels need it and should just follow crane specs.

    Glad it worked for you.

  6. #76
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    Quote Originally Posted by Pappabear View Post
    Yep, pretty cool and straightforward technology. It's ashamed that most barrels need it and should just follow crane specs.

    Glad it worked for you.
    True although most makers are building barrels to run with Wolf, Tula, etc. That's fine but it doesn't necessarily work for everybody.

    Sent from my SM-G930P using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

  7. #77
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    Quote Originally Posted by Tokarev View Post
    True although most makers are building barrels to run with Wolf, Tula, etc. That's fine but it doesn't necessarily work for everybody.

    Sent from my SM-G930P using Tapatalk
    All the more reason I wish someone would offer custom barrels with your choice of length and porting.

    Sent from my XT1585 using Tapatalk
    “Answer The Bell...” J.W.

  8. #78
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    Quote Originally Posted by jpmuscle View Post
    All the more reason I wish someone would offer custom barrels with your choice of length and porting.
    Which configurations would you choose?
    Black River Tactical
    BRT OPTIMUM HFCL Barrels - Hammer Forged Chrome Lined 11.5", 12.5", 14.5"
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 12.5" MRC, 11.5" CQB, 9" PDW
    BRT EZTUNE Preset Gas Tubes - CAR and MID
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
    BRT MicroPin Gas Blocks - .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  9. #79
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    Quote Originally Posted by Clint View Post
    Which configurations would you choose?
    Personally I'd like to see 11.5" more than anything else. But I'm sure guys would like 10.3/5, 12.5, 13.7.

    Sent from my XT1585 using Tapatalk
    “Answer The Bell...” J.W.

  10. #80
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    Quote Originally Posted by Clint View Post
    Which configurations would you choose?
    I'd probably say an 11.5 to start.

    Maybe sell these with your block pre-installed but not pinned. Include a .068 or .070 port along with something like .063 for dedicated suppressed.

    Sent from my SM-G930P using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

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