Project help

Discussion in 'Gun Project Questions & Gunsmithing' started by RonS, Sep 4, 2017.

  1. RonS

    RonS

    Joined:
    Jul 30, 2010
    Messages:
    482
    i have a barrel blank I would like to have built for an AR project. What is the tenon dimension for an AR barrel to install a barrel extension? Should the barrel be chambered first? Thanks for the help...

    Ron
     
  2. jaclthr

    jaclthr Gold $$ Contributor

    Joined:
    Jun 7, 2006
    Messages:
    74
    Hello Ron,

    The print for an AR-15 Service rifle Barrel shows the tenon to be .620 long with a .125 "Crash" groove of that .620 total and diameter is .8125 @ 16 TPI Class 3A threads. I chamber as any barrel, the barrel extension is the action and the bolt is the bolt I get my measurements and chamber as normal, mostly. That's how I do it anyway, hope it helps.

    jaclthr
     
  3. RonS

    RonS

    Joined:
    Jul 30, 2010
    Messages:
    482
    jaclthr, thanks for the info. PM sent
     

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