MP-Pistol Forum banner

stress mark on frame?

  1. Stress mark on M&P9c frame???

    New Member Introductions
    So I was cleaning my M&P 9c the other day and noticed a faint gray line that appears to start from the roll pin above the trigger guard and runs down thru the trigger guard. I can't see any cracks but I was wondering If anyone else has the same mark on their frames? It looks similar to a stress...