Suppressed Auto's

BattleAxe

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Minuteman
  • Mar 3, 2010
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    I'm likely going to suppress one of my autos. Either the M1A or SASS. Which one would be easier from a gas system modification standpoint and which platform would have fewer potential issues?
     
    Re: Suppressed Auto's

    SASS, they can both be tuned for the back pressure of the can you choose, but you will probably find more people who have current information regarding systems associated with the SASS.

    If you choose the M1A, you can do it right. It will likely be more cost and time intensive.
     
    Re: Suppressed Auto's

    Suppose that makes sense. Nothing is cheap about the M1A build I'm working on and I really don't need any warranty issues with the SASS. I may just wait and suppress a bolt gun.

    Is it a safe assumption that its easier to transition from suppressed to non suppressed and back on a bolt gun without a change in accuracy?
     
    Re: Suppressed Auto's

    I'm not sure what you mean when you talk about a gas system
    modification when it comes to suppressing the M14/M1A.

    All I needed to do was install the correct GLFS and DC Vortex from
    SEI on my M14 and my Fisher sound suppressor works like a charm.

    M21A5 Crazy Horse EBR SASS
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: H2O MAN</div><div class="ubbcode-body">I'm not sure what you mean when you talk about a gas system
    modification when it comes to suppressing the M14/M1A.

    All I needed to do was install the correct GLFS and DC Vortex from
    SEI on my M14 and my Fisher sound suppressor works like a charm.

    M21A5 Crazy Horse EBR SASS </div></div>

    Can you remove the suppressor and fire non suppressed without changing anything?
     
    Re: Suppressed Auto's

    I'm asking this stuff becaue I was under the impression that supressing an AR10 platform can't/shouldn't be done without modifying the gas system to handle it, and was assuming the M1A is the same. Is this inaccurate on both counts?
     
    Re: Suppressed Auto's

    It's inaccurate on both counts, to my knowledge.

    Now, in both cases, it's true that many people install adjustable gas systems for use with a silencer (a Schuster adjustable gas cylinder nut in the case of the M1A) to reduce the amount of gas driving the system, because the silencer increases back-pressure. But it isn't necessary.

    The military's suppressed SR-25 and M-14 variants feature no gas system modifications.
     
    Re: Suppressed Auto's

    Interesting. What negative results come from not reducing the pressure for each platform? I'm reluctant to do anything that's going to disturb accuracy.
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">works like a charm.</div></div>

    Can you post some groups with and without the can at 800 yards?

    I'm curious to see how accurate the new M21A5 Crazy Horse EBR SASS are. What was the cost?

    Thanks.

    <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">I'm reluctant to do anything that's going to disturb accuracy. </div></div>

    You can call Kreiger and talk to them about the difference in port sizes on barrels they sell for M14/M1A and the factory M1A and why they are different.

    They are also offering M-110 barrels at the moment as well.

    Here is a good explanation of adjustable gas blocks if you decide to go that route.

    http://www.noveskerifleworks.com/switchblock/
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BattleAxe</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: H2O MAN</div><div class="ubbcode-body">I'm not sure what you mean when you talk about a gas system
    modification when it comes to suppressing the M14/M1A.

    All I needed to do was install the correct GLFS and DC Vortex from
    SEI on my M14 and my Fisher sound suppressor works like a charm.

    M21A5 Crazy Horse EBR SASS </div></div>

    Can you remove the suppressor and fire non suppressed without changing anything? </div></div>

    Absolutely.

    The suppressor is easily removed and the DC Vortex flash hider remains in place.

    In this picture I am moving my M14 suppressor over to my DC Vortex wearing 7.62 AKM.

    7.62DC-Vortex-AKM.jpg
     
    Re: Suppressed Auto's

    From what I'm reading it almost appears that all things being equal, an M1A may be less likely to have issues given the simplicity of the gas system.
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BattleAxe</div><div class="ubbcode-body">From what I'm reading it almost appears that all things being equal, an M1A may be less likely to have issues given the simplicity of the gas system. </div></div>

    That has been my experience and they run cleaner.
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: H2O MAN</div><div class="ubbcode-body">That has been my experience and they run cleaner. </div></div>
    I had a gut feeling going in to this thread that the M1A would be a better choice just for simplicity sake. Plus they're easier to repair with less crap to break.
     
    Re: Suppressed Auto's

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: deersniper</div><div class="ubbcode-body">Pretty sure you can bend op rods and stuff when suppressing a M1A and you get a lot more gas blowback in your face. </div></div>Sure, you can break stuff but there's a lot less of it to break and teardown is a breeze. Gas is nowhere near as "in your face" as it is with an AR platform. Either way, a bolt gun is in my future and I may just suppress that.
     
    Re: Suppressed Auto's

    There is a good bit of blowback that is easily diverted away from the shooters face with either a breech shield or s scope mount.
    Bent op rods are associated with loads that are heavier than 175 gr and hot loads. I mostly shoot 168 gr and less.