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Thread: Thoughts on front sight base

  1. #11
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    If you look at the picture posted in this post, https://www.m4carbine.net/showthread.php?t=6642
    about halfway down or so, you'll see why I am worried. The holes are almost perfectly lined up and have plenty of meat around them. My holes are farther down on the bbl and the rear is just like the first picture I posted. I guess I am saying mine were done like crap I guess.
    Last edited by 86K5; 10-23-10 at 17:27.

  2. #12
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    The holes are fine. You must take their purpose into consideration. They hold the front sight base on the barrel and down against the gas port, that is all. I would rather have the holes closer to the edge of the barrel than the bore.

  3. #13
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    Quote Originally Posted by 86K5 View Post
    If you look at the picture posted in this post, https://www.m4carbine.net/showthread.php?t=6642
    about halfway down or so, you'll see why I am worried. The holes are almost perfectly lined up and have plenty of meat around them. My holes are farther down on the bbl and the rear is just like the first picture I posted. I guess I am saying mine were done like crap I guess.
    sort of "done like crap," but it's really a non-issue. it doesn't hurt anything, and the issue is not where the holes were drilled- it's where the barrel bore was drilled into the FSB.. it must have gotten cockeyed in the jig or something, for it to have been drilled so off-center as to be canted. that's a production flaw, most likely perpetrated by a forging company sub'd by daniel defense. daniel defense didn't notice the cant, located the pilots where they should have been in the center of the pin shelves, and drilled accurately. since the FSB was bored canted, the pin holes were drilled off center.

    you can chose to get hung up about it, or drive on. i'd drive on, personally. if you simply have to scratch that itch, DD will take care of you. email joe@danieldefense.com. he'll tell you it's nothing to worry about- but he'll probably take it back if you insist.

    your replacement assembly will be drilled through the bottom of the barrel, not through-and-through.

  4. #14
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    Yeah, I have decided to not worry about it unless a real problem comes up. I also have no doubt that I would be taken care of and this wasn't to call into question the quality of their work. I know their stuff is top notch. I was looking to have my mind set at ease beings this was my first build from parts. Imagine what's gonna happen when I get the first scratch!

  5. #15
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    I also agree that it doesn't affect anything tangible, except a lower front sight post... but I do not think that FSB should have made it through QC, especially from a manufacturer like DD... It is clearly "off" and should have been scraped, IMO.

    It gives the "impression" that QC may be lacking somewhere and I would inform DD of it just as a heads up...

    Also, if the MOE HG would have been removed for the pics, it would have been better, but it appears that the taper pin below the gas port may not be pulling the FSB down tightly as it could be... Functionality aside, I am a proponent of good machining, especially from manufacturers who warrant a "Tier 1" rating... If it would have been from another source, it would not be worthy of comment.

    Rmpl
    Last edited by Rmplstlskn; 10-24-10 at 11:02.
    "Our destruction... will be from another quarter. From the inattention of the people to the concerns of their government, from their carelessness and negligence..."
    ...Daniel Webster, June 1, 1837

  6. #16
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    I think we're mixing cause and effect here. no matter how the holes are drilled, they can't cause the FSB to become misaligned in the way shown.

    what it appears to me is that the FSB was wrong and the holes being different are a response to that.

    edit: that's kind of a shame because now that the barrels been drilled, you can't simply replace the FSB...
    Last edited by ra2bach; 10-24-10 at 15:16.
    never push a wrench...

  7. #17
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    Quote Originally Posted by ra2bach View Post
    I think we're mixing cause and effect here. no matter how the holes are drilled, they can't cause the FSB to become misaligned in the way shown.

    what it appears to me is that the FSB was wrong and the holes being different are a response to that.

    edit: that's kind of a shame because now that the barrels been drilled, you can't simply replace the FSB...




    My thought exactly but oh well. It is what it is. As I stated before, if it poses a problem down the line, I'll worry about it then. I did send DD an email through their site so they were aware of the situation. It just gives me an excuse to buy one of their hammer forged barrels now!!
    Last edited by 86K5; 10-24-10 at 16:21.

  8. #18
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    Who knows man, with DD's level of CS, they may swap you a CHF barrel!

    They've always been good to me.

  9. #19
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    I didn't think of the fact that I wont be able to swap the FSB.

  10. #20
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    Quote Originally Posted by 86K5 View Post
    I didn't think of the fact that I wont be able to swap the FSB.
    FSBs are never interchangeable.. a very skilled gunsmith can sometimes retrofit new ones, but you generally just get a new barrel.

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