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Thread: Indexing muzzle brake

  1. #1
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    Indexing muzzle brake

    I found with the muzzle brake that I have, just using a crush washer doesn't allow me to have it indexed properly so I bought some peel washers. For clarity sakes, I do use the peel washers in conjunction with the crush washer to get a proper indexing, correct?
    Better to have it and not need it than need it and not have it.

  2. #2
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    You use one type or other.
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    Thank you, this helps
    Better to have it and not need it than need it and not have it.

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    What brake are you installing?
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    Quote Originally Posted by snakedoctor View Post
    What brake are you installing?
    I got rid of the plastic bag it was in and I got it long time ago. It came with a crush washer, but its very apparent that I need to use peel washers because its just not indexing correctly.
    Better to have it and not need it than need it and not have it.

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    • Be sure to use a fresh, new crush washer.
    • Use plenty of lube; anti-seize preferred.
    • Orient the crush washer with the flared side towards the muzzle device, and the narrow end against the barrel shoulder.
    • "Crush" the washer using a minimum of 20, and a maximum of 45 lbs. of torque.
    • If you have a long way to go, only do quarter turns and then back it off. You will crush it incrementally about 1/8th of a turn at a time. Sneak up on the timing, because once it is properly oriented, you do NOT want to back it off.

    Good luck.
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    If you really want to take the time, you can actually use a wetstone to take the crush washer down to a point where you can get it where it needs to be to do the final tightening on it. It doesn't take too long to do and just takes a little trial and error as to mow much you need to take off and how it indexes. Hit the new surface with a little cold blue and you will never see it. I've done several this way and have always had good results, and never have had a problem with them staying tight.

    KyAKGuy

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    Quote Originally Posted by deadon57 View Post
    I got rid of the plastic bag it was in and I got it long time ago. It came with a crush washer, but its very apparent that I need to use peel washers because its just not indexing correctly.
    I suspect you don't know how to use a crush washer. Since they will crush over more than 360 degrees, it's virtually impossible for them not to allow proper indexing.

  9. #9
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    I think you are right.

    Quote Originally Posted by Hmac View Post
    I suspect you don't know how to use a crush washer. Since they will crush over more than 360 degrees, it's virtually impossible for them not to allow proper indexing.



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  10. #10
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    Quote Originally Posted by KyAKGuy View Post
    If you really want to take the time, you can actually use a wetstone to take the crush washer down to a point where you can get it where it needs to be to do the final tightening on it. It doesn't take too long to do and just takes a little trial and error as to mow much you need to take off and how it indexes. Hit the new surface with a little cold blue and you will never see it. I've done several this way and have always had good results, and never have had a problem with them staying tight.

    KyAKGuy
    This is what I do as well. I cannot count the # of AR rifles I've built/rebarreled etc., but I have always struggled with crush washers. The sheer amount of torque that's required seems like an obscene amount of stress on the muzzle area metal. I've put crush washers in my vise before and been absolutely unable to crush them - IN A VISE. So I started buying my crush washers from somewhere else - same thing. Was told to buy YHM crush washers - same thing. I despise peel washers, so I usually just end up carefully filing crush washers down to fit perfectly (tight, but not torque'd to hell on the threads.)
    Last edited by Brahmzy; 05-01-12 at 13:35.

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