ACTUALLY, I DO NOT KNOW OF ANY MODERN STRIKER FIRED PISTOL, THAT MAY GIVE A SECOND HIT ON A BAD PRIMER, WITHOUT FIRST EJECTING AND RECHAMBERING THE BAD ROUND. DA/SA, OR DAO CAN DO THAT SIMPLY BY SQUIZING THE TRIGGER AGAIN. SA ON THE OTHER HAND, JUST BY COCKING THE HAMMER FIRST. THEREFORE, A STRIKER FIRED IS NEITHER SA, OR DAO. APPARENTLY, BACK IN THE DAY BATF HAD ONLY A SPECIFIC CHECKLIST AVAILABLE TO CATEGORIZE TRIGER ACTIONS, AND SOMEHOW THEY HAD TO FIT THIS STRIKERFIRED MECHANISM INTO IT, WITHOUT INVESTIGATING TOO MUCH. HENCE A GLOCK FOR STARTERS, AND THEN EVERYTHING ELSE THAT FOLLOWED WAS CHECKED AS A DAO. AS FAR AS I KNOW, THE SPRGFLD ARMONY XD LINE OF PISTOLS, COMPLETELY COCKS THE STRIKER ON EACH SLIDE RECIPROCATION. HENCE THE GRIP SAFETY ON THEM. NOT SURE THOUGH ABOUT IT. THAT IS JUST SOMETHING I WAS TOLD BY GUYS THAT HAVE THEM.