Pennsylvania Firearm Owners Association
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  1. #1
    Join Date
    Nov 2010
    Location
    Indpls, Indiana
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    Default Mossberg 500A hard to rack with new barrel

    I have a Mossberg 500A 12ga that came with a rifled & vented barrel. Since I use it mostly for home defense I purchased a used 20" smooth bore barrel with rifle sights. When I install the new barrel, it takes a lot more effort to slide the forearm fully forward. The forearm moves freely but there is resistance the last ½” or so. I've compared the ends of the two barrels and they look identical.
    Any suggestions on what is causing this and how to fix?

    Greatly appreciate any help!
    ddudeck

  2. #2
    Join Date
    May 2009
    Location
    secret, Pennsylvania
    (Montgomery County)
    Posts
    355
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    Talking Re: Mossberg 500A hard to rack with new barrel

    make sure the smooth's notches and od at the chamber of the barrel are identical...micrometer identical

  3. #3
    Join Date
    Jun 2009
    Location
    ✠ Ēǻζţ ŞŧЯǿŪđ§βũЯģ, Pennsylvania
    (Monroe County)
    Posts
    5,606
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    Default Re: Mossberg 500A hard to rack with new barrel

    try taking it apart and putting it back together. Maybe something didnt seat right. Is it screwed as far down as possible?

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