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Thread: Mid-length ejection angle

  1. #41
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    What Lysander said. Take the gas block off. The center of the rear set screw dimple should be the same distance from the shoulder as the gas port center.

    Most “local” gunsmiths are complete morons, in my experience. Like, $&@# up a wet dream morons. Regardless of where “local” has been over the years. Anything past installing Glock sights is too complex. This is why I own a BRD jig, a drill press, and a MI URR. I no longer even trust local gunsmiths to do a P/W on a muzzle device that I’ve pre-installed. I take that shit to a body shop instead. At least they can follow instructions and not replace my shims with a crush washer.

    Reputable gunsmiths do exist, and you can hear about them in this forum. Ned Christensen and John Thomas spring to mind. I’m sure Clint (Black River Tactical) would be able to do this job correctly, also.
    Last edited by 1168; 08-02-21 at 16:30.

  2. #42
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    Quote Originally Posted by Wow View Post
    Here is an image of those measurements. I think it is closer to 0.250". I think I gave you the right value.

    https://i.imgur.com/TbYHQeC.png
    Your scale is graduated in 1/32 inch divisions, the gap is at least 1/32 inch, probably a half more.

    1/32 = 0.03125

  3. #43
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    I got a borescope and this is the footage of it. It looks like the block is off a little bit. I don't know if this is bad or within the realm of good.
    Would appreciate some input.

    https://i.imgur.com/q2wcBP7.mp4

    Am I crazy or is the hole in the gas block not even a circle. Looks like it is more eye or oval shaped?

    https://imgur.com/a/hwm3Dlt
    Last edited by Wow; 08-02-21 at 21:11.

  4. #44
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    Did the barrel come with the gas block installed or pre dimpled?
    Big brother is watching...and listening.

  5. #45
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    Quote Originally Posted by prepare View Post
    Did the barrel come with the gas block installed or pre dimpled?
    It came pre dimpled
    Last edited by Wow; 08-03-21 at 11:13.

  6. #46
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    Quote Originally Posted by Wow View Post
    It came pre dimpled
    I thought Criterion barrels came with a dimple so it’s probably not an alignment issue.

    Do you know how to check your gas rings on the BSG and ensure the gas key is tight?
    Last edited by prepare; 08-03-21 at 11:58.
    Big brother is watching...and listening.

  7. #47
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    You have a little erosion on the barrel port, and a little off center gas block, neither of which should cause severe under-gassing.

    I see no major issue here.

    And from the initial post I fail to see what the problem is. If you replace one brand new ejector spring with another brand new ejector spring you might see a similar change in ejection pattern.

    People get way to wrapped around the axle worrying about ejection angle.
    Last edited by lysander; 08-03-21 at 16:50.

  8. #48
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    Quote Originally Posted by prepare View Post
    I thought Criterion barrels came with a dimple so it’s probably not an alignment issue.

    Do you know how to check your gas rings on the BSG and ensure the gas key is tight?
    Stand the BCG on the bolt and if it doesn't drop it is GTG?
    Last edited by Wow; 08-03-21 at 17:44.

  9. #49
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    Quote Originally Posted by Wow View Post
    Stand the BCG on the bolt and if it doesn't drop it is GTG?
    Correct.

    Providing there is no gas leakage your mid length build should lock back on an empty magazine with full power ammo.
    Big brother is watching...and listening.

  10. #50
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    Quote Originally Posted by prepare View Post
    Correct.

    Providing there is no gas leakage your mid length build should lock back on an empty magazine with full power ammo.
    It was doing that on my carbine lower but not on my A5 H2 lower.

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