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Thread: Upper assembly problem

  1. #11
    Join Date
    Mar 2015
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    Quote Originally Posted by LRRPF52 View Post
    Did you install the gas tube already?

    If the gas block is too far to the rear, the tube can bind the carrier key, and consequently the bolt lock-up with the extension.
    I'm going to has to ask this question again....

  2. #12
    Join Date
    Jan 2008
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    AZ-Waging jihad against crappy AR's.
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    Step one- Get parts made to spec. Step two- You aren't going to trouble shoot this by using more garbage parts. Step three- post some pics which could prove to be valuable.



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  3. #13
    Join Date
    Jul 2006
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    The correct assembly process is first installing the bolt carrier without the bolt to check for gas tube alignment.

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