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Thread: Tips for precision assembly?

  1. #11
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    Quote Originally Posted by Djstorm100 View Post
    Going to try the "precision" game and just replacing barrel on a existing upper that I have (BCM). I'm curious as to any tips to squeeze extra accuracy out of the rifle example would be bedding gas block, bedding (placing red loctie around the barrel extention), truing up the front of the receiver where the barrel nut threads are and etc.

    Thanks!
    Good components are key. Here are the little extra's I do to my guns:

    1. Square and re-crown the barrel.
    2. Do not exceed 40lbs on the barrel nut.
    3. Do not exceed30-40LBS on the FH/MB.
    4. Fit the bolt to the barrel extension.
    5. Check the trueness of the upper receiver rail.


    Good luck!


    C4

  2. #12
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    Quote Originally Posted by bp7178 View Post
    All of these "precision" steps won't make the slightest difference if you're using crap ammo.
    This the ammo I stock pile. I want to see what it will do with this ammo, then I'll build a load for it.

  3. #13
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    Quote Originally Posted by C4IGrant View Post
    Good components are key. Here are the little extra's I do to my guns:

    1. Square and re-crown the barrel.
    2. Do not exceed 40lbs on the barrel nut.
    3. Do not exceed30-40LBS on the FH/MB.
    4. Fit the bolt to the barrel extension.
    5. Check the trueness of the upper receiver rail.


    Good luck!


    C4
    Thanks Grant! All I know how to do but fitting the bolt to the extension.

    Edit: Seems like the only thing one can do when fitting a bolt is have a few bolts and see which one fits the tightest in the barrel extension. Sounds like I need to buy some extra bolts, as I only have two. Since I only have 2 complete Ar's.

    https://www.m4carbine.net/showthread...lt-to-a-barrel
    Last edited by Djstorm100; 06-02-14 at 09:20.

  4. #14
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    Quote Originally Posted by Djstorm100 View Post
    Thanks Grant! All I know how to do but fitting the bolt to the extension.

    Edit: Seems like the only thing one can do when fitting a bolt is have a few bolts and see which one fits the tightest in the barrel extension. Sounds like I need to buy some extra bolts, as I only have two. Since I only have 2 complete Ar's.

    https://www.m4carbine.net/showthread...lt-to-a-barrel
    Do you have the correct gauges and the range on the bolt to barrel ext fit? If not, you really aren't fitting the bolt.

    Controlling the barrel nut weight just means that you use either a BCM or Geissele rail OR buy the Geissele shims so you can time nut. You will also need a calibrated torque wrench. Same for for the FH/MB.

    You can send your barrel to us and we will square it and put an 11 degree crown on it for you. Cost is $30.



    C4

  5. #15
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    Quote Originally Posted by Iraqgunz View Post
    You really don't need any of this stuff. Get good components (barrel, rail and trigger) and couple that with good ammo. Most people cannot shoot the potential of their rifles and they often times short change themselves by using crappy ammo and optics.
    This. If you have a good barrel, the next area of focus is on the Ammo.
    "You people have too much time on your hands." - scottryan

  6. #16
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    Grant,

    I only have a set of go/no go gauges. I'm looking more in to this and digging up as much as I can, I'm really curious how this is done now and the science behind it. I did order the shim just in case as I did read about that on here from one of your older post. :thumbsup:

    What the turn around time on the barrel normally?
    Thanks!

    Quote Originally Posted by C4IGrant View Post
    Do you have the correct gauges and the range on the bolt to barrel ext fit? If not, you really aren't fitting the bolt.

    Controlling the barrel nut weight just means that you use either a BCM or Geissele rail OR buy the Geissele shims so you can time nut. You will also need a calibrated torque wrench. Same for for the FH/MB.

    You can send your barrel to us and we will square it and put an 11 degree crown on it for you. Cost is $30.



    C4

  7. #17
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    Quote Originally Posted by Djstorm100 View Post
    Grant,

    I only have a set of go/no go gauges. I'm looking more in to this and digging up as much as I can, I'm really curious how this is done now and the science behind it. I did order the shim just in case as I did read about that on here from one of your older post. :thumbsup:

    What the turn around time on the barrel normally?
    Thanks!
    Those gauges won't do anything towards fitting a bolt.

    Turn around is usually 3-5 days.


    C4

  8. #18
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    Quote Originally Posted by C4IGrant View Post
    Those gauges won't do anything towards fitting a bolt.

    Turn around is usually 3-5 days.


    C4
    Awesome!

    Would you need a match set of gauges or a totally different total different type?
    http://www.midwayusa.com/product/549...-223-remington


    Using tapatalk

  9. #19
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    Those are the gauges needed to fit a bolt. 1.4646 is the money one IIRC.

  10. #20
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    That ammo is probably every bit as good, if not better than U.S made. But, it's not match ammo.

    Quote Originally Posted by bp7178 View Post
    All of these "precision" steps won't make the slightest difference if you're using crap ammo.



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