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m14 gun smith

  1. Gunsmithing
    My SA M1A was manufactured in 1998. I am the 2nd owner so don't know how many rounds he put down the barrel, but I have about 400. Twice I have had it go full auto for 2 to 3 round burst. Trigger group is clean and can not see any noticeable problems, but there is a problem. Can anyone help?