tabbed gas block

  1. USMC-03XX

    Mk 12 build advice

    So to start off I’m not planning on ever running this suppressed. I have no preference of 18” or 16”, was leaning towards 16” because I like the balance. And prefer short. But if there’s legit reasons to go rifle length gas and 18” over mid 16” please educate me. Barrel is coming from centurion...