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Thread: I messed up a Colt 14.5" barrel while drilling it for an extended FH

  1. #11
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    If you were to cut just behind the hole you drilled and re-threaded for a muzzle device, what length barrel would you have?
    - Jeff

    “Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right.” ― George Orwell, 1984

  2. #12
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    Quote Originally Posted by Canonshooter View Post
    Any disruption of the rifling at the muzzle will usually adversely effect accuracy. I don't recall where I read that, but it's one of the reasons that cleaning a barrel from the muzzle end must be done with care.

    Once the hole filled is filled with the welded-in FH pin, I don't think there would be a safety issue. How much - if any - the accuracy is effected will only be revealed with a trip to the range. The toughest part will be cleaning up the hole of any burs inside the barrel.

    I agree - rebarrel and save this one for a SBR project.
    Any disruption of the Crown will affect accuracy! Porting a barrel does not make it less accurate. Put the pin in and make sure its not into the rifling. it will straighten itself out. Make sure to weld the pin and grind down or polish afterwards. My guess is, it will be fine. if not , what did you lose by trying it.
    "PEACE is that brief, glorious moment in history when everybody stands around reloading"

  3. #13
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    Can you not SBR it in your state?

  4. #14
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    Quote Originally Posted by THCDDM4 View Post
    IF no one here has a striaght answer, I would call colt and see what they have to say and then take it to a gunsmith to look at, as mike 556 mentioned. Sounds like it should be dead to me if the chrome/rifling weas drilled through, but I am no professional.


    Colt isn't going to help him.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  5. #15
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    Quote Originally Posted by Davy35D View Post
    I need help and sage advice. Last night I decided to assemble two 14.5" uppers I had in the safe, one a Colt and the other an FN (no marks on it I can see other than NATO 1x9). Anyway I decided to do the Colt first and as I was drilling the pin hole in the threads for the extended A2 FH pin I must have dozed off because I drilled straight through the barrel and chrome lining into the bore. Have I ruined this barrel? Is it worth/safe to shoot? Is the accuracy potential for this barrel gone? Is there any way to salvage it without having it cut down to a shorter length?


    FN doesn't make 14.5" barrels

    You should have built an SBR instead of pinning and welding a flash hider. I see you live in Kansas.

    Your $400 barrel is now $50

    Get rid of it and move on.
    Last edited by scottryan; 08-19-10 at 19:30.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  6. #16
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    People port barrels all the time and don't have issues. Pin the flash hider in place and shoot it.

  7. #17
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    Simple SBR it or sell it to some one that will.

    Having a hole near the crown of my expensive colt barrel doesn't make sense.

  8. #18
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    Quote Originally Posted by scottryan View Post
    Your $400 barrel is now $50
    $400 is a little high, but I will give you $50 for it Davy35D. They only thing I can see it doing is affecting accuracy.

  9. #19
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    Cut it back and pin a KX3 on it, I know Rainier Arms stocks a 13.7 inch WOA barrel for this purpose. It's an idea.

    http://www.rainierarms.com/?page=sho...roduct_id=1642

  10. #20
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    FN does not make 1/9 barrels as far as I know. Not bashing on you, but this is why we send barrels to ADCO and other places. Last time I checked M4 barrels were about 400.00-425.00.

    I think the best you can hope for is cutting it down and recrowning it. You may also need to do something with the gas port.

    Since SBR's are legal in Kansas I would go that route. Or try and sell it and get a 16" barrel.

    Quote Originally Posted by Davy35D View Post
    I need help and sage advice. Last night I decided to assemble two 14.5" uppers I had in the safe, one a Colt and the other an FN (no marks on it I can see other than NATO 1x9). Anyway I decided to do the Colt first and as I was drilling the pin hole in the threads for the extended A2 FH pin I must have dozed off because I drilled straight through the barrel and chrome lining into the bore. Have I ruined this barrel? Is it worth/safe to shoot? Is the accuracy potential for this barrel gone? Is there any way to salvage it without having it cut down to a shorter length?



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