Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 35

Thread: AAC...are you serious?

  1. #11
    Join Date
    Dec 2012
    Location
    Texas
    Posts
    547
    Feedback Score
    8 (100%)
    jumbopanda, what does your 7/8" wrench actually measure? What brand is it? Take a caliper to them. Many wrench open ends are out of spec and mic larger than marked. Or they OE spreads over time with use. This would create a very narrow contact patch at the ends of the flat and making roll over exceptionally easy.

    A contributing factor is the steel used for the brake and the flats measurement.

  2. #12
    Join Date
    Mar 2009
    Location
    California
    Posts
    107
    Feedback Score
    4 (100%)
    Quote Originally Posted by Shorts View Post
    jumbopanda, what does your 7/8" wrench actually measure? What brand is it? Take a caliper to them. Many wrench open ends are out of spec and mic larger than marked. Or they OE spreads over time with use. This would create a very narrow contact patch at the ends of the flat and making roll over exceptionally easy.

    A contributing factor is the steel used for the brake and the flats measurement.
    The wrench measured 0.884" and the flash hider measured a couple of thousandths over 0.875" if I remember correctly.

    What's really surprising is that the brake measures 0.806" and my Hammerhead Tool measures 0.836" (it's advertised as 0.825"). Now that's a loose fit.
    Last edited by jumbopanda; 06-30-13 at 15:19.

  3. #13
    Join Date
    Jun 2009
    Location
    Arizona
    Posts
    845
    Feedback Score
    6 (100%)
    I thought that Rocksett was similar in cementing ability to blue Loctite?
    "Every step we take towards making the State our Caretaker of our lives, by that much we move toward making the State our Master." Dwight D. Eisenhower

  4. #14
    Join Date
    Mar 2009
    Location
    California
    Posts
    107
    Feedback Score
    4 (100%)
    Quote Originally Posted by darr3239 View Post
    I thought that Rocksett was similar in cementing ability to blue Loctite?
    This is my understanding as well.

  5. #15
    Join Date
    Dec 2012
    Location
    Texas
    Posts
    547
    Feedback Score
    8 (100%)
    Quote Originally Posted by jumbopanda View Post
    The wrench measured 0.884" and the flash hider measured a couple of thousandths over 0.875" if I remember correctly.

    What's really surprising is that the brake measures 0.806" and my Hammerhead Tool measures 0.836" (it's advertised as 0.825"). Now that's a loose fit.
    Yeah, pretty large gap there.


    Oh, you asked about why the special tool for the brake? I believe it is so a brake can be installed after a free float rail when that rail extends past the end of the barrel and you can't get a wrench onto a flat. If the rail really extends past the brake, an extension can even be used to reach down in there. Make sense?


    ETA: I think your flat section on your brake just broke. Speculating the piece was fatigued/stressed enough during install that the slightest force you applied sheered it. Once you get the brake off post pics of both pieces and the metal underneath. Striations or marks on the raw steel ought to tell a story.
    Last edited by Shorts; 06-30-13 at 15:47.

  6. #16
    Join Date
    Jun 2009
    Location
    Allentown, PA
    Posts
    3,389
    Feedback Score
    58 (100%)
    Rockset is not like blue locktite. It does not react to heat. It will, however, loosen up if you soak it in water. My suggestion when installing/removing an AAC device is to use a taped up screwdriver and place it in between the holes of the break or through the points of the flash hider. If the device was installed properly in the first place, there will be no marks or damge by using this method. I have installed countless amounts of AAC breaks and flash hiders in this manner and have never damaged any of them or had any come loose.
    "Perfect Practice Makes Perfect"
    "There are 550 million firearms on this planet. That's one firearm for every 12 people. The question is... How do we arm the other 11?" Lord of War.
    "I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." Thomas Jefferson

  7. #17
    Join Date
    Jul 2007
    Location
    New Jersey
    Posts
    7,152
    Feedback Score
    4 (100%)
    OP not looking to bust your chops but on my phone it looks like you may have worn the surface of the visible flat, which may have contributed to the initial problem if it didn't occur during your work.
    Last edited by Safetyhit; 06-30-13 at 16:28.

  8. #18
    Join Date
    Mar 2009
    Location
    California
    Posts
    107
    Feedback Score
    4 (100%)
    Quote Originally Posted by Safetyhit View Post
    OP not looking to bust your chops but on my phone it looks like you may have worn the surface of the visible flat, which may have contributed to the initial problem if it didn't occur during your work.
    Hm? The picture is of the damage after the problem occurred.

    Quote Originally Posted by CoryCop25 View Post
    Rockset is not like blue locktite. It does not react to heat. It will, however, loosen up if you soak it in water. My suggestion when installing/removing an AAC device is to use a taped up screwdriver and place it in between the holes of the break or through the points of the flash hider. If the device was installed properly in the first place, there will be no marks or damge by using this method. I have installed countless amounts of AAC breaks and flash hiders in this manner and have never damaged any of them or had any come loose.
    This one was factory installed. I'm gonna play it safe and just get the tool; I can probably sell it afterwards anyways.
    Last edited by jumbopanda; 06-30-13 at 16:33.

  9. #19
    Join Date
    Jul 2007
    Location
    New Jersey
    Posts
    7,152
    Feedback Score
    4 (100%)
    Quote Originally Posted by jumbopanda View Post
    Hm? The picture is of the damage after the problem occurred.

    Yes, after looking again I see you are referring to what looks like a crumpled region instead of a worn one. Guess it happened when the "ring" sheared off. Some strange stuff there.

  10. #20
    Join Date
    Mar 2009
    Location
    California
    Posts
    107
    Feedback Score
    4 (100%)
    Quote Originally Posted by Safetyhit View Post
    Yes, after looking again I see you are referring to what looks like a crumpled region instead of a worn one. Guess it happened when the "ring" sheared off. Some strange stuff there.
    Exactly.

    Quote Originally Posted by Shorts View Post

    ETA: I think your flat section on your brake just broke. Speculating the piece was fatigued/stressed enough during install that the slightest force you applied sheered it. Once you get the brake off post pics of both pieces and the metal underneath. Striations or marks on the raw steel ought to tell a story.
    Yeah, that's pretty much what happened. I'll be sure to check it out after my tool arrives.
    Last edited by jumbopanda; 06-30-13 at 16:35.

Page 2 of 4 FirstFirst 1234 LastLast

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
  •