Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 28

Thread: OOPS!

  1. #11
    Join Date
    Oct 2012
    Posts
    36
    Feedback Score
    0
    Yes I'm sure it happened then. The shaving of metal was inside the block. It wasn't a chip. It was more like a shaving. Almost like the corner of the clamshell stressed it. The block is endented in as well. Maybe I didn't have it alligned 100%.whos knows. Again, I could care less about it as long as it won't cause a problem later down the line.
    Quote Originally Posted by markm View Post
    I gots to think that there's NO friggin way that happened from barrel nut wrenching. Are you certain it didn't get dinged elsewhere and you just now noticed? Was the missing material there on the bench?

  2. #12
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    27,214
    Feedback Score
    14 (100%)
    Wow. Hard to say. I wish ESK or KLDavis could chime in on this. They have a little more knowledge in upper receiver stresses.
    "You people have too much time on your hands." - scottryan

  3. #13
    Join Date
    Oct 2012
    Posts
    36
    Feedback Score
    0
    Me too. I want an industrie pro's opinion. Thanks Everyone else!
    Quote Originally Posted by markm View Post
    Wow. Hard to say. I wish ESK or KLDavis could chime in on this. They have a little more knowledge in upper receiver stresses.

  4. #14
    Join Date
    Jun 2006
    Posts
    10,039
    Feedback Score
    1 (100%)
    It's dead Jim.

    While I have no doubt people are willing to tell you it is fine, or that you should be ok, I'll call BS on that and say no.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  5. #15
    Join Date
    Jan 2012
    Posts
    1,397
    Feedback Score
    2 (100%)
    heh, if those were the worst marks on my gun I'd be doing pretty well.

  6. #16
    Join Date
    Jun 2006
    Posts
    10,039
    Feedback Score
    1 (100%)
    Quote Originally Posted by Noodles View Post
    heh, if those were the worst marks on my gun I'd be doing pretty well.
    You stress fracture your receivers worse than that?
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  7. #17
    Join Date
    Dec 2009
    Location
    Utah
    Posts
    8,420
    Feedback Score
    3 (100%)
    Blend the damage smooth, then refinish the worked area. The ideal thing would be if you could treat it with Alodine then hit it with some paint. If the fracturing is localized, you'll be ok. If there is micro fracturing over a larger area, you could have problems. My guess, from looking at the photos, the fracturing is localized. 7075 forgings are pretty tough. But that's a guess. It should be fine to continue shooting but just keep an eye on it. If the fracturing continues, get a new upper receiver. (I deal with aluminum aircraft structures including forgings as a professional technician.) After blending but before applying Alodine or paint, examine the area with a strong light and at least a 10x magnifying glass for cracks. You can also use dye pen. Dye pen is probably over kill, but I'd rather advise you to use it and have you find nothing than tell you everything will be fine only to discover the damage is more extensive than first thought.

    Blending will reduce the stress risers the damage has introduced. Blend it just deep enough to smooth out the damage and long and wide enough so there is a smooth transition to the undamaged area. Don't go crazy and don't over think it. By hand, blend with 180 grit emery cloth and water and maybe follow it up with 220 grit. You can tape off around the damage to control the size of the blended area
    Last edited by MistWolf; 04-25-14 at 23:02.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  8. #18
    Join Date
    Jan 2012
    Posts
    1,397
    Feedback Score
    2 (100%)
    Quote Originally Posted by Stickman View Post
    You stress fracture your receivers worse than that?
    Not seeing a stress fracture in the picture. You sure you aren't maybe jumping to conclusions?

  9. #19
    Join Date
    Jun 2006
    Posts
    10,039
    Feedback Score
    1 (100%)
    Quote Originally Posted by Noodles View Post
    Not seeing a stress fracture in the picture. You sure you aren't maybe jumping to conclusions?


    Yes, I'm jumping to conclusions, I've never actually held a firearm before, I just like to come here and pretend I'm cool like the rest of the girls.


    ETA- Please post a picture of one of your carbines that has more damage than that, especially after your previous comment.
    Last edited by Stickman; 04-25-14 at 19:51.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  10. #20
    Join Date
    Oct 2012
    Posts
    36
    Feedback Score
    0
    Not saying i have a stress fracture. Just wondering if that chip from the block would cause the whole side of the receiver to become weaker.

Page 2 of 3 FirstFirst 123 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
  •