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Thread: Cant tell if overgassed. 1-2:00 ejection, wear on leading edge of deflector.

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    Cant tell if overgassed. 1-2:00 ejection, wear on leading edge of deflector.

    Hey guys, went shooting a new build today and it wasn't perfect.

    Brass is landing at 1-2:00 and the leading sharp edge of my deflector is scraped.

    Build is 20"Noveske rifle length barrel, Noveske upper receiver, Spikes NIB BCG, Stag efx a1 stock with standard a2 rifle buffer and a2 spring.

    Thoughts?
    Last edited by Swstock; 12-27-15 at 21:06.

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    I wouldn't put too much thought into ejection pattern, as long as it's consistent with each type of ammo. I'd run some 5.56 and some of the weakest stuff you will use and ensure everything runs without issue. If it's reliable that's the main thing.

    I don't believe there are various buffer weights for rifle stocks.

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    Quote Originally Posted by Swstock View Post
    Hey guys, went shooting a new build today and it wasn't perfect.


    Thoughts?
    Is the rifle extracting and ejecting on every shot? Is the bolt/carrier locking-back every time after the last round of the magazine is fired?

    If the answer to both of the questions above is "yes", then leave it alone.


    ...
    Last edited by Molon; 12-27-15 at 22:36.
    All that is necessary for trolls to flourish, is for good men to do nothing.

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    Quote Originally Posted by Molon View Post
    Is the rifle extracting and ejecting on every shot? Is the bolt/carrier locking-back every time after the last round of the magazine is fired?

    If the answer to both of the questions above is "yes", then leave it alone.


    ...
    Agreed. I've seen noticeable variations in ejection pattern between identical rifles simply due to variations in ejector and extractor tension. In this case, they were LMT carbines bought in a batch of 600+ for my agency.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

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  5. #5
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    Same here. We took one of our 11.5" reduced gas port barrels and it was ejecting in almost the same place as the other 11.5" with a standard port.

    Quote Originally Posted by BufordTJustice View Post
    Agreed. I've seen noticeable variations in ejection pattern between identical rifles simply due to variations in ejector and extractor tension. In this case, they were LMT carbines bought in a batch of 600+ for my agency.



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    Thanks guys.

    I'll leave it alone. I guess that pie chart was in my head.

    Its seems reliable, as I had no malfunctions. I guess i was second guessing my build.

    Thank you

    Im attaching a pic of the brass, Id rather it not be getting dented. Ive ran this bolt and barrel with another receiver and don't remember noticing it. I also have guns that don't do it.

    Threads I've searched on other forums say "shoot it it's fine, but I want the M4C answer.
    Attached Images Attached Images
    Last edited by Swstock; 12-28-15 at 08:33.

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    Quote Originally Posted by Swstock View Post
    Thanks guys.

    I'll leave it alone. I guess that pie chart was in my head.

    Its seems reliable, as I had no malfunctions. I guess i was second guessing my build.

    Thank you

    Im attaching a pic of the brass, Id rather it not be getting dented. Ive ran this bolt and barrel with another receiver and don't remember noticing it. I also have guns that don't do it.

    Threads I've searched on other forums say "shoot it it's fine, but I want the M4C answer.
    1. Those dents won't affect anything.
    2. Those dents are from the brass deflector/ejection port (watch and see where the brass hits: https://www.youtube.com/watch?v=cnovh3w2qRM)
    3. Extraction and ejection from a semi or full automatic can be violent, it needs to be for reliable clearing of the case from the weapon, minor dents are to be expected. There are some designs that leave major dents, like the Johnson M1941, which ruins brass on ejection.

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    Quote Originally Posted by Iraqgunz View Post
    Same here. We took one of our 11.5" reduced gas port barrels and it was ejecting in almost the same place as the other 11.5" with a standard port.
    Speaking of the devil, I just shot my reduced 11.5" the other day. Ran like a scalded dog. I can PM you the range results if you want. I think you'd be interested.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

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    The purpose of dedicated gas porting is unfortunately not always aligned with an end users needs for possible serious use. Aligning for some low pressure scenarios can reduce the span of function than with some more regular stuff.
    Sure, many combinations exist. That is a given. Some may benefit differently, just depends. Excess gas is not a net positive. Insufficient gas results in losses or negatives as well.
    A possible combination may be standard 5.56 in a Colt 11.5", that combo runs well with the H2 for many. Want to guess the factory gas port size?
    Another possible combination in a 11.5" 5.56 AR that may have a reduced size gas port compared to Colt. It may run an A5H2 with a Colt rifle spring, with a LMT enhanced carrier, and a sound mitigating device. Want to guess a possible gas size range in those?
    Another possible combination could be a 11.5" 5.56 AR that intends to use .223 or lesser port pressure ammo with a 3.0 ounce buffer, carbine action, with no option of a can. Want to guess a gas port size?
    The unfortunate reality is that commercial market always seems to fall for default cheap fodder in part. The contract market has less variables in consideration (normally).
    So, is the Colt a good choice? Yep, it would more than likely function best overall.
    Is the small gas port choice good? It does if it satisfies their goals. Same could be argued about the large gas port possibility.
    The big question is, why do so many accept trash as a standard for use? Sure, the basic economics say it is more affordable, I don't beleive it should alter considerations that could reduce operation for those that need it as a requirement seriously.
    Last edited by tom12.7; 12-28-15 at 20:50. Reason: oops!

  10. #10
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    Quote Originally Posted by BufordTJustice View Post
    Speaking of the devil, I just shot my reduced 11.5" the other day. Ran like a scalded dog. I can PM you the range results if you want. I think you'd be interested.



    Owner/Instructor at Semper Paratus Arms

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    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

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