Results 1 to 4 of 4

Thread: Of muzzle brakes and barrels. . .

  1. #1
    Senior Member L1A1Rocker's Avatar

    Join Date
    Jul 2010
    Location
    TX Hill Country
    Posts
    3,421

    Of muzzle brakes and barrels. . .

    Some of you may recall I have an on going SBR project (SBR #2) and Form 1 silencer project to match. I wanted the shoulder of my custom muzzle brake to tuck under the hand guards so that meant a 7.5" barrel. To that end I bought a heavy contour 10.5" from 10-Ring to cut down to size. Now on to Cut, Crown, and Thread.








    Next step is to parkerize the brake and the exposed metal on the barrel.

    So into the bead blasting cabinet went the brake. (I did not bead blast the threads) The after photo. . .



    And then a good soaking in some Simple Green degreaser



    Then into a hot water bath to clean off the degreaser and bring the part up to temp.




    And then into the solution.



    Say, did you know that parkerizing dissolves aluminum? A lot of people know that, but here's a cute point of trivia, it also dissolves Melonite. Yep, I found that out the hard way. . . more on that later.

    Here's a short vid of the bubbling action.

    http://vid79.photobucket.com/albums/...725_150349.mp4

    And then into the cooling tank.



    And then a good oiling to neutralize the parkerizing salts. And now I ran into a problems. Notic all that black on the paper towel? The park was wiping right off the brake.



    And here you can see my beautiful two tone barrel - 1/2 Melonite, 1/2 Parkerized. And I have a partly parkerized brake with most of the park having wiped away. Now I have to note here that I do not hold 10-Ring responsible for this at all. When you tinker, you run into this kind of stuff.



    Close up.



    The next day a friend was to come over. He is graciously loaning me his wood fired smelter to melt down a few WW's I've got piling up. I showed him my beautiful barrel and he, like me, was concerned about the bore being part melonite and part parkerized. So I decided to try things again and drop the whole barrel in to strip off the rest of the melonite. I also decided to re-do the brake and made up some new solution to try.

    Well the barrel came out "decent" but not great. You can still make out that it was done in two stages and just make out the line in the middle. But oiled up it's not bad, and of course it's hidden under a handgaurd. Some day I may bead blast it and do it over - some day. The brake??? Did the same darn thing!!!

    After some discussion with my friend, I was convinced to try again with a few changes. He believed that there was something on the surface of the brake that the Simple Green just wasn't getting off. (or the 4140 roundstock was mismarked and really some kind of metal that wouldn't take parkerizing) So I tried a third time changing two variables. I cleaned the brake with ether and added a LOT more concentrate to the solution.

    Results were GREAT - it worked. God Bless good friends, he wound up babysitting the brake this last time while I was putting things away. He even did the messy job of oiling the brake afterword.

    Now some pics.







    Well, this barrel was for my second SBR and I decided to go ahead and assemble the upper today. But I ran into ANOTHER problem. I've been amassing all the parts over the last year or so and have most everything I need. I buy things on sale and picked up a great buy on the upper. It's a PSA blemish that was only 40 bucks. But I forgot something, the parts kit needed for the stripped upper - DHO!

    So I decided to just put this barrel on my other SBR sense it was disassembled anyway. I'm going to have to eventually get a shim kit to get the brake installed correctly. But right now my silencer is not done so I can just use a crush washer to install it. Without further wordeyness, here it is.









    Next up, shooting it. I anticipate that I'll have to open up the gas port a bit. The barrel was 10.5" long with a .093 gas port. Chopping it down to 7.5" I'll prolly need to open that up to around .104 or so. Stay tuned. . .
    US Constitution: Article 1 Section 8 Paragraph 4

    The Congress shall have Power To establish an uniform Rule of Naturalization

  2. #2
    Forum Administrator Schuetzenman's Avatar

    Join Date
    Jul 2010
    Location
    East of Atlanta GA
    Posts
    15,015
    .300 Black Out for the barrel? With a suppressor on it, should look very nice. I was wondering what was going on with the project.

  3. #3
    Senior Member L1A1Rocker's Avatar

    Join Date
    Jul 2010
    Location
    TX Hill Country
    Posts
    3,421
    Quote Originally Posted by Schuetzenman View Post
    .300 Black Out for the barrel? With a suppressor on it, should look very nice. I was wondering what was going on with the project.
    Yes, that's 300Blk. The project is making very, very slow progress.
    US Constitution: Article 1 Section 8 Paragraph 4

    The Congress shall have Power To establish an uniform Rule of Naturalization

  4. #4
    Senior Member

    Join Date
    Jul 2010
    Location
    Wreckless driving on dirty back roads
    Posts
    8,959
    What ever happened with the rifle you silenced a few years back? The one where the silencer
    was the length of the barrel? If I remember right it was a .308. These days my memory seems iffy
    at best. That was a good thread. Nice looking SBR by the way. What do you think was on the break
    where you needed ether to clean it?
    Last edited by l921428x; 08-01-2015 at 12:04 AM.
    While no one ever listens to me,
    I am constantly being told to be quiet.

    In a world of snowflakes,
    be the heat..

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •