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Thread: OOPS!

  1. #21
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    The pictures make it look way worse than it is. Showed colt the pics. For what it's worth , they saig it's GTG.
    Quote Originally Posted by MistWolf View Post
    Blend the damage smooth, the 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

  2. #22
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    Exactly how much muscle went into this? You'd know if you had to put your body weight into cranking on this thing.
    "You people have too much time on your hands." - scottryan

  3. #23
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    No body weight used. Just a grunt or two. Just put 200 rnds through it no problems and it looks the same.
    Quote Originally Posted by markm View Post
    Exactly how much muscle went into this? You'd know if you had to put your body weight into cranking on this thing.

  4. #24
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    Quote Originally Posted by coburna View Post
    The pictures make it look way worse than it is. Showed colt the pics. For what it's worth , they saig it's GTG.
    It may be GTG but I wouldn't trust it until I had it thoroughly checked out by a competent gunsmith. Preferably one who specializes in ARs.

    I'm curious what clamp / vice you were using. I just ordered one of these. I'll let you know how it works.

  5. #25
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    Quote Originally Posted by coburna View Post
    The pictures make it look way worse than it is. Showed colt the pics. For what it's worth , they saig it's GTG.
    Well, how about that. Glad that's solved and worked out for you. I'm sure Colt knows what they are talking about. So good to go.

    There is a term for similar-metal seperation (aluminum alloy to aluminum oxide (anodizing is just dyed (edit: and sometimes not dyed) controlled aluminum oxidization for the most part)) that I learned in a metallurgy class once. Forget what it is, but I do remember that it had a wierd name that back ally came down to "chipped". It was like a single blurb, during pages of info about dissimilar metal deformation - that's the sexy one anyone cares about.

    Color it black and call it a lesson

    Blackrifle above me is correct, those G rods are THE SHIT!
    Last edited by Noodles; 04-27-14 at 00:57.

  6. #26
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    Anodizing can be done without any dye (Class 1). Without the dye, the aluminum would be a dull grey
    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

  7. #27
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    Another vote for Geissele reaction Rod, great addition to the tool box, I am surprised Noodles shipped mine back to me a year ago Mine has come in handy many times and paid its value after one usage. I picked one up when they were still 69.99. IMO no AR tool box is complete without one. I have changed out rails, assembled uppers, gas block work etc. You will not regret it.


    "It's Dangerous To Go Alone! Take This."

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  8. #28
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    OP has contacted the manufacturer, who let him know the carbine was safe to operate.

    Since we now know there will be no giant conflagration and ensuing loss of life, let's put this one to bed, shall we?

    Good night, everyone.

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