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Thread: Please help me diagnose this junk!

  1. #11
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    Quote Originally Posted by sinlessorrow View Post
    This was happening to my BCM not long ago, mine was remanuf. Ammo that was loaded to hot.
    Hot ammo causing high bolt carrier speed?
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  2. #12
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    Quote Originally Posted by Clint View Post
    Hot ammo causing high bolt carrier speed?
    Yeah, it didn't have time to eject. I was having the symptoms the op had as well as a spent case on top of a new round that was trying to feed.

    I have now tried M193 and M855, as well as 75GR TAP and all work perfect in my rifle. So the OP's gun could be cycling fast.
    Last edited by sinlessorrow; 09-20-12 at 12:56.
    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  3. #13
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    Quote Originally Posted by Clint View Post
    Is it really overgassed?

    223 ammo is lower pressure and tends to run better in overgassed setups.

    If cases are hitting the rear of the ejection port rather than the deflector, they can bounce straight forwards.

    Is their dissy a mid gas with rifle hand guards ?
    I'm with Clint on this. Sounds like it's probably over-gassed. Maybe try shooting it with an H3 buffer? By no means a fix (PSA should be responsible for that), but may get you closer to a diagnosis.

  4. #14
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    Stranger things have happened but...

    I can believe over-gassed and bolt bounce on an SBR, but a 16" gun? I mean, yeah, it's probably over-gassed, but if it's enough to bounce the bolt on a 16" gun, that's got to be a huge gas port.
    Semper Paratus Certified AR15 Armorer

  5. #15
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    I've seen this issue on a 16" barrel before. Way over-gassed.

  6. #16
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    Dissapators can be tricky to tune. Due to the length of the barrel /gas pickup.
    Last edited by SteveS; 09-20-12 at 13:12.

  7. #17
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    I'm going with a sticking ejector. For 200 rds there is a lot of brass on the deflector and its all over the place. It seems pretty inconsistant compared to my guns that all have a in line pattern of strikes on the deflector. Probably debris in the ejector that moves with inertia of the bcg wfen fired.

    By the way... the rear sight is broken.
    "Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -Benjamin Franklin

  8. #18
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    Quote Originally Posted by SteveS View Post
    Dissapators can be tricky to tune. Due to the length of the barrel /gas pickup.
    Depends on how it's made. A true dissapator uses a standard carbine gas system with an FSB pinned on @ rifle length.

    Nick, how is the gas setup on the PSA gun?
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  9. #19
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    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  10. #20
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    Quote Originally Posted by ASH556 View Post
    Depends on how it's made. A true dissapator uses a standard carbine gas system with an FSB pinned on @ rifle length.

    Nick, how is the gas setup on the PSA gun?
    It has a carbine gas system


    I am also thinking it is waaay over-gassed. The recoil impulse is very sharp on this gun. You can kinda see that from the video in my first post.

    I was running an "H" buffer in it during the video/test yesterday.
    "The future's uncertain, and the end is always near." Jim Morrison

    "Fortuitous outcomes reinforce poor training and tactics"

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