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Thread: Issue with rifle surfaced during training course, report

  1. #31
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    my dd safety lever still had a bit of a edge around the divit holes no amount of lube would fix. after tedious work with several grains of sand paper i made the chanel semi-correct. ill never stray from CMT/colt again. i still may order a correct part. never had your problem, but ill look on that rifle.

    why did you replace the Noveske bolt carrier?

  2. #32
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    wingo,

    Almost forgot to mention that, thanks. I replaced the bolt with a complete BCM unit for no good reason. The bolt carrier is Noveske.

    Edited to add: The BCM bolt has been in the rifle since the beginning. I've got around 1600 rounds through the rifle now. I know over time the bolt lugs settle into the corresponding lugs in the upper receiver extension (at least I've read that). Is there any chance that could be the issue? If so is to too late to throw the Noveske bolt back in and give it a try?
    Last edited by Serpico1985; 09-28-10 at 00:27. Reason: add comment

  3. #33
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    With regards to the round hanging on the upper, are you riding the charging handle or letting it slam home from full compression?

    I I have a trick I do to all my barrels prior to install. I take a small diamond dust file and bevel the corners on the 5 and 7 o'clock cut-outs in the locking recess(barrel extension) and I polish the feed ramps below and this area too with a felt bob on a dremel and jewler's rouge. I assure this area is a smooth as a babie's bottom.

    Also, check your recoil spring assembly.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  4. #34
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    And that's a Bolt Catch, not a Mag Catch.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  5. #35
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    Heavy Metal,

    With regards to riding the charging handle. When loading I always have the bolt locked to the rear, insert full mag, ensure mag is seated by firmly tapping the bottom a couple of time, press bolt release, round hangs up, hit bottom of mag once or twice, bolt slams home and chambers round. There have been a couple times where I would insert the full mag with the bolt closed and cycle the BCG with the CH. Same thing would happen and I would make extra sure to not ride the CH.


    With regards to beveling the corners of the receiver extension. This is a Noveske chrome lined barrel. I would imagine the barrel is chromed in this area as well. Would there be issues with attempting to file that area, even a little bit?

    I looked at that area on my rifle and it appears to be pretty smooth. I don't notice any significant step where it transitions from the receiver feed ramps to the barrel feed ramps, but this is just a uneducated observation.

    Bolt catch, mag catch, I was typing fast.

    Thanks again.

  6. #36
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    Quote Originally Posted by Serpico1985 View Post

    Honestly I havent considered that. Thank you sir. I guess I've been assuming it was my error on assembly and/or parts tolerance stacking. But now that you mention that I will defiantly consider it. I would like to exhaust all other avenues first so that I don't pay shipping both ways (easily close to $100) to find out that it was a $5 part. I would defiantly defer to the knowledge base on this forum, if y'all say send it back I'll do so.

    You said the Noveske lower was a cosmetic second.

    I don't believe the issue with this lower is purely cosmetic.

    Companies just don't have piles of items to give away at a discount just because they have an irregularity in the finish.

    The first thing you should have done was replace the entire LPK with Colt parts from SAW or Brownells.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  7. #37
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    The lower came stripped with the upper during a promotion from noveske. I also realize that 'parts aint parts'. I thought it was a safe bet going with a DD lpk based on their reputation. It may still be a gtg lpk if the receiver is out of spec on some area. Noveske plainly states on their website that the 2nd run lowers are dimensionally correct and suffer only cosmetic blems. So I don't really feel like I took a risk or rolled the dice with the lower. It may just be out of spec.
    Last edited by Serpico1985; 09-28-10 at 22:32.

  8. #38
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    Allright. I'll contact Noveske about it and see what they say. I'll let everyone know what they say.

  9. #39
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    What happens if you download the mags to 28 rounds?

    Also, what buffer and spring are you using?

  10. #40
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    If I download to 28 rounds it will load as it should. If I remember correctly its a carbine buffer spring. I'm not sure which buffer, standard heavy buffer I think. I did research and bought whichever one everyone generally recommended for a midlength rifle.

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