MAC-10 SWG Jamming Help

Discussion in 'Gunsmithing Forum' started by gun4fun, Jun 29, 2011.

  1. gun4fun

    gun4fun New Member

    Hopefully someone has some advice.
    I have a SWD/Cobray MAC-10 A1A Full Auto I bought new.
    In great shape using new Zytel 32rd Mags and new 115gr 9MM ammo from
    Federal or other bulk manufacturer. After full cleaning, still cannot go more
    than 8-10 rounds before jamming. The spend case will not extract fully
    before the bolt returns forward and jams.
    Any ideas ?
    Is the ammo too weak to reliably cycle the rounds ?
    Are the bolt springs too strong ?
    While not the most advanced SMG, I should be able to get more than a few
    rounds through it.
    Any help / advice is most appreciated.
  2. CHLChris

    CHLChris New Member

    Bought it new? Full auto?

    Welcome to FTF. How about you go on over to the Introductions thread and tell us a little about yourself. It's good to see another PDX'er here.