Results 1 to 6 of 6

Thread: First FAL build questions

  1. #1
    Gunco Veteran Icarus's Avatar
    Join Date
    Dec 2005
    Posts
    1,054
    Feedback Score
    4 (100%)

    Default First FAL build questions

    I got my receiver barreled today, and installed the gas tube, if I put the rec. in a vise and level it, then run a long thin straight cleaning rod through the gas tube, the cleaning rod should settle to bottom dead center of gas tube(right?). Then if the cleaning rod aligns with top dead center at mussel, timing should be good?

    Also I installed the BHO and the mag catch, the BHO is a little sticky, will this work itself out or should I remove and use a little emory cloth?
    When do I need to install locking shoulder?
    Is there a way to check for any feed issue at this stage?
    American By Birth, Southern By the Grace Of God

  2. #2
    Gunco Good ole boy kernelkrink's Avatar
    Join Date
    Jun 2004
    Posts
    5,046
    Feedback Score
    2 (100%)

    Default

    The BHO doesn't move enough to "wear in", so clean up the hole and BHO so it moves easily.

    Once the bbl is in, you can headspace and select your locking shoulder. Once you have the proper LS, install it.

  3. #3
    Chief Administrator 7.62x39's Avatar
    Join Date
    Feb 2004
    Posts
    6,625
    Feedback Score
    10 (100%)

    Default

    Icarus,

    As kernel mentioned, you can set your HS any time after the barrel is torqued.
    Do you have access to a set of pin gages as well as the go/no-go gages?
    .

  4. #4
    Gunco Veteran Icarus's Avatar
    Join Date
    Dec 2005
    Posts
    1,054
    Feedback Score
    4 (100%)

    Default

    Quote Originally Posted by 7.62x39 View Post
    Icarus,

    As kernel mentioned, you can set your HS any time after the barrel is torqued.
    Do you have access to a set of pin gages as well as the go/no-go gages?
    Heck No
    American By Birth, Southern By the Grace Of God

  5. #5
    Gunco Veteran Icarus's Avatar
    Join Date
    Dec 2005
    Posts
    1,054
    Feedback Score
    4 (100%)

    Default

    On the bottom of the barrel shoulder there is a small hash mark, is this a timing mark, and should it be bottom dead center?
    American By Birth, Southern By the Grace Of God

  6. #6
    Gunco Member MCQ1's Avatar
    Join Date
    May 2006
    Location
    Southern Illinois
    Posts
    126
    Feedback Score
    0

    Default

    Headspacing in a semi-auto is pretty critical to get right. You really need the proper tools for that ie. the pin gauges and GO/NOGO gauges so you can order the correct sized locking shoulder. As far as timing goes you can get by with just two STRAIGHT 3/16" steel rods (mine are 36" long...I got them at Lowes or Home Depot). Find the centers of your rods, with your receiver in the vise, lay one across the receiver rails and and put the other through the screw hole for the hand guards in the gas block. Make sure your rod sits flat in the hole in the gas block. I used rubber bands to hold them in place. As you are torquing your barrel get down and eyeball the rods. When they are parallel you are timed correctly.

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •