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Thread: When building your first AR - most common errors?

  1. #31
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    You guys make the front pivot pin way too difficult. Haven't lost a detente yet. You don't even need to buy the "tool" just go down to the hardware store and buy a 1/4" x 2" clevis pin. Insert spring and detent into receiver.
    Compress detent in recess using 3/32" punch and rotate tool.
    Push out tool with pivot pin and rotate until detent is in groove of pivot pin.



    http://www.ar15.com/content/guides/a...ower/#pivotPin
    Last edited by AKDoug; 01-05-13 at 18:18.

  2. #32
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    The most common error is to buy shitty components and try to save money.

    "I can build you an Ar for 800 bucks" (Instead of just buying a colt for 1000)

    From what i've learned, the only thing you can scrimp on is the stripped lower. In many cases a 70$ one is as good as a 190$ one.
    Quote Originally Posted by skd_tactical View Post
    It's a shot in the dark ... I have a better chance of guessing when my wife will be mad for no reason.
    "If your not using an aimpoint, you need to take a ****ing piss test." -LAV

  3. #33
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    For the barrel nut and receiver threads, I'm assuming this will work ok:

    http://arp-bolts.com/pages/arpultratorque.shtml

    I have that on hand, and love it for my engine builds.

  4. #34
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    Quote Originally Posted by AKDoug View Post
    You guys make the front pivot pin way too difficult. Haven't lost a detente yet. You don't even need to buy the "tool" just go down to the hardware store and buy a 1/4" x 2" clevis pin. Insert spring and detent into receiver.
    Compress detent in recess using 3/32" punch and rotate tool.
    Push out tool with pivot pin and rotate until detent is in groove of pivot pin.



    http://www.ar15.com/content/guides/a...ower/#pivotPin
    I have about a 50/50 success rate with that method alone. I do use mine to load the spring and detent pin, and then slip the Xacto blade in to hold it in place. I then push the the Clevis pin through with the front pivot pin.

  5. #35
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    The best lube to use is Aeroshell MS33 grease. This is an aviation grease and the only one on the covilian market that meets the mil-spec requirements for use on the AR as it has no graphite in it to possibly cause corrosion between the steel and aluminium. Easily found on the internet.

  6. #36
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    Quote Originally Posted by jet66 View Post
    I have about a 50/50 success rate with that method alone. I do use mine to load the spring and detent pin, and then slip the Xacto blade in to hold it in place. I then push the the Clevis pin through with the front pivot pin.
    The only issues we've had are if the clevis pin and the takedown pin both have too much bevel on their ends. The detente pin will get stuck between them. I dress the end of the clevis pin nice and square and they alleviates the issue for me.

  7. #37
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    Quote Originally Posted by AKDoug View Post
    The only issues we've had are if the clevis pin and the takedown pin both have too much bevel on their ends. The detente pin will get stuck between them. I dress the end of the clevis pin nice and square and they alleviates the issue for me.
    I tried something similar as well, I cut the end off (Clevis pin) completely square. It helped, but still didn't go issue-free every time.

    There is always this tool, but I don't know about dropping that much money for it.

  8. #38
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    Large clear plastic bag over the front of the lower when installing the pivot pin, spring, and detent. Those pins can fly all over if you do not have the timing down right.

    Also, taping up the sides of the receiver when installing the bolt catch. First one I built ended up with a small scar before I even finished building it.
    "Tyranny cannot be safe without a standing army, an enslaved press, and a disarmed populace." -James Madison

  9. #39
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    Forgetting to stake the castle nut.

    Being in too much of a hurry.

  10. #40
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    I prefer the small c-clamp method to pliers or vice grips. I also wonder how many lowers are ruined every year from people breaking one of the ears off the trigger guard when trying to Rambo the roll pin into place?

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